@mohit07 said: Sunday rakhte hain ,Vision saar issi confy mein kuch bolne wale the na?
Am ok with Sunday!! 😃 Please keep time as 10/10.30 PM.
Kaptaan saahab - Let us know the final timing 😃
Cheers!for how many 4 digit nos is thousand digit greater than tens digit,which is greater than unit's digit??
Whats wrong in the following approach:
lets take unit digit as 1 and tens digit as 2...corresponding nos can be-->70
then take unit digit as 1 and tens digit as 3...corresponding nos will be-->60
smilarly, 50,40..10
now lets take unit digit as 2 and tens digit as 3...nos will be 60
similarly for others will add as-->70*1+60*2+50*3....10*7=840
@CBZ123 said: for how many 4 digit nos is thousand digit greater than tens digit,which is greater than unit's digit??Whats wrong in the following approach: lets take unit digit as 1 and tens digit as 2...corresponding nos can be-->70 then take unit digit as 2 and tens digit as 3...corresponding nos will be-->60 smilarly, 50,40..10 now lets take unit digit as 2 and tens digit as 3...nos will be 60 similarly for others will add as-->70*1+60*2+50*3....10*7=840
wat abt the cases wen v have units digit as 1 and tens digit as 3...in question ko karne ka shortcut hota h...find the total number and multiply it by a fraction of arrangements...
it goes as...
numbers possible - 9*9*8*7
dere wld b only one way of arranging dem i.e. thousands tens and units..so
ans is 9*9*8*7/6 = 756...is dat the answer ??
P=(3x5x7x9x....99)/(2x4x6x8x...100)thena. 1/3
b. 1/5
c. 1/10
d. 1/15
e. none of dese...
greatest integer less than or eual to (sqrt3+1)^8
dnt rember d ans bro....share ur approach whtever it is...
@firsty
@bemad said:KOI mere sawaalo ka b jawaab do.....
dekhi is greatest integer waale mein...
let y = (sqrt3 + 1)^8
x = (sqrt3 - 1)^8
add both of dem x + y
u will observe one thing dat the odd power containing terms wld b cancelled and even power wld remain..
the beauty is x
so watever u get subtract one from that...u wld get the answer...
think i was unable to put my appraoch across
_ _21-->70 cases
_ _31-->60 cases
......... _ _ 81-->10 cases
now,
_ _32-->60 cases..
_ _ 42-->50 cases...
if we calculate it upto _ _87 we get
70*1+60*2+50*3....10*7=840
In ur ans it should be 9*10*8*7/6=840
Shorter approach is,
10c3*10=1200 but whats wrong in above app??
@nits2811
ques - am I allowed to write in this thread?
regarding the arrangement question I think it should be (10C3)*10 = 1200
Select any three number and we can arrange them in only one way ( PS - we dont have to take care of zero in the thousand digit as according to the given arrangement thousands digit should be the maximum of the three digit chosen )
and hundreds digit can be chosen in 10 ways
So , (10C3)*10
@MI8888 said: @nits2811ques - am I allowed to write in this thread?regarding the arrangement question I think it should be (10C3)*10 = 1200Select any three number and we can arrange them in only one way ( PS - we dont have to take care of zero in the thousand digit as according to the given arrangement thousands digit should be the maximum of the three digit chosen )and hundreds digit can be chosen in 10 waysSo , (10C3)*10
u are always allowed...
ohh i missed dose cases where the digits wld b the same...yeaa i feel thats correct...
@CBZ123 said: Got it I missed 0 at unit's digit.! ans is 1200 as @MI8888 mentioned
yess 0 was missed i also made an error in the approach...
8*10*9*10 / 6 = 1200
@nits2811 said:wat abt the cases wen v have units digit as 1 and tens digit as 3...in question ko karne ka shortcut hota h...find the total number and multiply it by a fraction of arrangements...it goes as...numbers possible - 9*9*8*7dere wld b only one way of arranging dem i.e. thousands tens and units..soans is 9*9*8*7/6 = 756...is dat the answer ??
bhai 9*9*8 *10 nahi hoga ye- 1st dig is=9 options, next dig-first digit ko chodke 8+0=9 digs, 3rd=pehle do ko chod ke -8 digits, aakhri any of the 10 digs=9*9*8*10/6 coz pehle teen ke arrangement me bas ek hi jamega..
@firsty said:bhai 9*9*8 *10 nahi hoga ye- 1st dig is=9 options, next dig-first digit ko chodke 8+0=9 digs, 3rd=pehle do ko chod ke -8 digits, aakhri any of the 10 digs=9*9*8*10/6 coz pehle teen ke arrangement me bas ek hi jamega..
haan bhai main apni mistake realise kar chuka huun...i have given the correct solution later on..
@nits2811 said:haan bhai main apni mistake realise kar chuka huun...i have given the correct solution later on..
parantu ans to 1200 aa nai paa rah hai is mere method se. thoda dekh ke bata dijie..
@firsty said:bhai 9*9*8 *10 nahi hoga ye- 1st dig is=9 options, next dig-first digit ko chodke 8+0=9 digs, 3rd=pehle do ko chod ke -8 digits, aakhri any of the 10 digs=9*10*8*10/6 coz pehle teen ke arrangement me bas ek hi jamega..
corrected...hundred's digit bhi toh 10 ways mein fill ho sakta h...
@nits2811 said:corrected...hundred's digit bhi toh 10 ways mein fill ho sakta h...
@firsty said:yup thank u..10C3*10 best hai kuch dimaag lagane ki zaroorat nhi hai
a. Even as a debate is on as to whether foreign companies should be allowed unfettered access to retail business, some large Indian conglomerates have entered the sector.
b. Wal-Mart may not be in India yet, but its essence is already pervasive here.
c. And, the tension that their entry has caused is palpable.
d. There may indeed be a kernel of truth in the hyped-up belief that launching a "Retail Revolution" is an attempt to overturn the traditional way of selling goods.
e. In the name of efficiency, and in the name of eliminating the much-abused middleman, they have already established niches in urban India and are aggressively expanding their operations.
b. Wal-Mart may not be in India yet, but its essence is already pervasive here.
c. And, the tension that their entry has caused is palpable.
d. There may indeed be a kernel of truth in the hyped-up belief that launching a "Retail Revolution" is an attempt to overturn the traditional way of selling goods.
e. In the name of efficiency, and in the name of eliminating the much-abused middleman, they have already established niches in urban India and are aggressively expanding their operations.
A) dbaec
B) daceb
C) badce
D) daecb
yeh karo zara mujhe doubt h isme!!!
@nits2811 said: a. Even as a debate is on as to whether foreign companies should be allowed unfettered access to retail business, some large Indian conglomerates have entered the sector. b. Wal-Mart may not be in India yet, but its essence is already pervasive here. c. And, the tension that their entry has caused is palpable. d. There may indeed be a kernel of truth in the hyped-up belief that launching a "Retail Revolution" is an attempt to overturn the traditional way of selling goods. e. In the name of efficiency, and in the name of eliminating the much-abused middleman, they have already established niches in urban India and are aggressively expanding their operations.A) dbaecB) dacebC) badceD) daecbyeh karo zara mujhe doubt h isme!!!
b?