Kakodhar is studying late into the night and is hungry. He opens his mother's snack cupboard without switching on the lights, knowing that his mother has kept 10 packets of chips and biscuits in the cupboards. He pulls out 3 packets form the cupboard, and all of them turn out to be chips. What is the probability that the snack cupboard contain 1 packet of biscuits and 9 packets of chips?
A. 6/55
B. 12/73
C. 14/55
D. 7/50
The answer is C. I'll be obliged if someone can explain.
how to solve this...
1. one liter of water was mixed to six liters of sugar solution containing 4% of sugar what is the % of sugar in the solution
ans: 6
2. two equal sized glasses are respectively 1/4th & 1/3rd full of orange juice. then they are filled with water & the contents are mixed a tumbler. the ration of orange juice to water in tmbler is
ans: 7: 17
3. a mixture is composed of 8 parts of whisky & 3 parts of water after adding 28 liters of water, if the mixture contains wisky one half as much as water then how many liters of wisky does it contain
ans: 96
4. a dishonest hairdresser uses a mixture having 5 parts after shave lotion & 3 parts water after taking out some portion of mixture he adds equal amt of water to the remaining portion of mixture such that the amt of after shave lotion & water become equal find the part of mixture taken out
ans: 1/5
Sum of the series -
5+55+555+...upto 20 terms ?
DMRC is plying trains between college and secretariat ,which is at a distance of 120km.There are three more stations between college & secretariat and the train stops for 2 mins at these 2 stations.What is the minimum number of trains DMRC should put in this route if trains are travelling at a speed of 40km/hr and it is desirable to have a regular interval of 6 mins between the departure of two trains from both the stations.?a.32 b.63 c.64 d.none of these
hey...i have a ques ..if a no has 720 factrs... hw many pairs of two factors are possible suct that on multiplyn the two factrs we get n and d factrs are co -prime .....
a stick is broken into 3 pieces.. what is the probab that the 3 pieces will form a triangle...?
Sum to infinity of the series 2/4,6/8,12/16,20/32,30/64........
1) 4
2) 3
3) 8
4) 2
An arbitrary natural number a and its nth pow can be written in the form 6k1+s and 6k2 + s respectively, where k1, k2 and s are some whole numbers and n is a natural number less than 50.How many values can n take?
1) 15 2) 24 3) 25 4) 26
Find the min value of the expression x2 + y2 + 6x + 10y + 11 such that x R
1) -19 2) -23 3) -22 4) -21
Find the last digits of the product of all 2-digit numbers that give a remainder of 2 when divided by 5
1) 2 2) 7 3) 4 4)NOTA
Two ferries ply back and forth across a river with constant speed, turning at the bank without loss of time. They leave opposite shores at the same time. They meet for first time 700 ft from one shore, continue on their way to the banks, while returning they meet for the second time 400 ft from the opposite shore. What is the width of river?
10001700
1300
1100
Company 'x' manufactures watches. The manufacturing cost is 40%, tax is 10% and 50% is their profit. If the manufacturing cost increases by 10% and tax by 1%, then the cost of watch has to be increased by 82 rupees to get the same profit. What is the amount of profit they can make per piece of watch?
Rs. 410
Rs. 820
Rs. 100
Rs. 1,000
The cost of 80% concentrated milk is 16 rupees/lt. Where as the cost of 60% concentrated milk is 13 rupees/lt. If a person purchase 80% conc, milk and mix water (which is free of cost) in it to make it 60% conc, milk, then by selling this milk how much profit he can make?
8.33%
10%
16.66%
20%
The first and the last term of an arithmetic progression, having at least three terms, are 5 and 25 respectively. If all the terms of this arithmetic progression are integers, find the number of different values that the common difference of the arithmetic progression can take.
a.4b.5
c.6
d.7
If the lines x = a + m, y = –2 and y = mx are concurrent, what is the least possible value of |a|?
a. √2
b.2√2
c.2√3
d.3√2
What is the minimum value of a^2*x + b^2*y + c^2*z if abxyz = 54c, where a, b, c, x, y and z are positive real numbers?
3c*(2ab)^1/3
9c^2/3*(2ab)^1/3
9c*(2ab)^1/3
None of these
What is the number of solution(s) of the equation |x|e^|x|=4? (e=2.72)
1
2
3
NOT
How many natural numbers are factors of at least one of 6^14, 10^12 and 15^20?
1. 835
2. 834
3. 794
4. 795
ABC is a rt triangle with B= 90 and A = 60, E is a point on BC such that BE = (1/3) BC. D is a point on AB such that DI ( I is incenter of ABC) parallel to AC. Find BDE
1) 30
2) 36
3) 45
4) CBD
If the LCM of the first 99 natural numbers is 'a', then what will be the LCM of the first 82 natural numbers?