@Subhashdec2 said:_ B_B_B_B_B_5 boys 6 spaces6 spaces to be filled by 5 girlsa+b+c+d+e+f=5b,c,d,e has to be 1a+b+c+d+e+f=16 solutions5!*5!*6
b+c+d+e=4
->a+f=1
(1,0) , (0,1) aur koi case possible nahi hai
@psk.becks said:b+c+d+e=4->a+f=1(1,0) , (0,1) aur koi case possible nahi hai
bhai b can be 2 as well
BGGBGBGBGB
b has to be 1 atleast
same for c d e
Subhashdec2
____/\____
Two-third of a consignment was sold at a profit of 5% and the remainder at a loss of 2%. If the total profit was Rs. 400, the value of the consignment (in rupees) was:
a] 20000 b] 15000 c] 12000 d] 10000
a] 20000 b] 15000 c] 12000 d] 10000
How many pairs of integers exist such that the difference between their sum and product is 42?a) 1b) 2c) 3d) 4
Twenty-ďŹ ve people sit around a circular table. Three of them are
chosen randomly. What is the probability that at least two of the three had
been sitting next to one another?
chosen randomly. What is the probability that at least two of the three had
been sitting next to one another?
@Faruq said:Two-third of a consignment was sold at a profit of 5% and the remainder at a loss of 2%. If the total profit was Rs. 400, the value of the consignment (in rupees) was: a] 20000 b] 15000 c] 12000 d] 10000
15000
@Faruq said:How many pairs of integers exist such that the difference between their sum and product is 42?a) 1b) 2c) 3d) 4
xy-x-y=42
(x-1)(y-1)=43
x=44
y=2
so 1??
@heylady said:Twenty-ďŹ ve people sit around a circular table. Three of them arechosen randomly. What is the probability that at least two of the three hadbeen sitting next to one another?
( 25*21C1 + 25 )/25C3 = 11/46 ?
@Faruq said:Two-third of a consignment was sold at a profit of 5% and the remainder at a loss of 2%. If the total profit was Rs. 400, the value of the consignment (in rupees) was: a] 20000 b] 15000 c] 12000 d] 10000
2/3x *1/20 -1/3x *1/50=400
x/30 - x/150=400
4x/150=400
x=15000
Faruq
15000,
2 sol. (0,-42), (2,42)
@VJ12 said:@saket.soni05Use Eulers theorem method2^2012/2012= 2^(2012/1004)/2012= 2^4=16
Can't use euler's theorem here! Num and Denom are not co-prime.
@Faruq said:How many pairs of integers exist such that the difference between their sum and product is 42?a) 1b) 2c) 3d) 4
(a+b) - (ab) = 42
a(1-b) - (1-b) = 41
(a-1)(1-b) = 41 ( prime)
So, a = 2, 42
b= -40, 0
2 pairs ?
@Faruq said:Two-third of a consignment was sold at a profit of 5% and the remainder at a loss of 2%. If the total profit was Rs. 400, the value of the consignment (in rupees) was: a] 20000 b] 15000 c] 12000 d] 10000
15000 ?
2/3*x*5/100 - 1/3x*2/50 = 400
x = 15000
@Subhashdec2 said:(x-1)(y-1)=43x=44y=2x=-42y=02??
Two cases are possible
a+b-ab=42 and ab-a-b =42
Total 4 ways are -> (0,42)(2,-40),(44,2),(-42,0)
a+b-ab=42 and ab-a-b =42
Total 4 ways are -> (0,42)(2,-40),(44,2),(-42,0)
@techgeek2050 said:option 2 ?AM >= GM
Bhai, iska solution kar do na..
a1+a2=...an/n>=(a1a2a3...an)^1/n but how did you get a1+2a2+...nan>=...
In how many ways can 10 identical objects be distributed among 5 different boxes, such that exactly two of boxes have one each and the rest of the boxes could have any number of objects but not 1 object in them.
@Faruq said:Two cases are possible a+b-ab=42 and ab-a-b =42Total 4 ways are -> (0,42)(2,-40),(44,2),(-42,0)
sahi h bhai
forgot the opp
integers par itna dhayan ni diya so thought sum bada kaise ho skta h...:P