Question
Average age of company A is 20 years and average age of
both companies A and B is 14 years. If the ratio of number of employees in company A and B is 1:2, then what is the average age of company B?Solution
Average of Company B = (14 × 3 - 1 × 20)/2 => (42 - 20)/2 = 11 years
A bag contains 4 red, 3 blue and 5 green balls (all identical in all respects except colour). One ball is drawn at random. What is the probability that ...
A box contains 12 black, 8 red and 10 green marbles. Two marbles are randomly selected from the box, what is the probability that a black and a green ma...
- 20 defective LED bulbs were mixed with 180 working LED bulbs. One bulb is selected randomly. What is the probability that the selected bulb is defective?
A bag contains 5 brown balls, 6 white balls and 9 red balls. Three balls are drawn at random. Find the probability that at least two balls are red.
Tokens numbered 1 to 350 are in a bag. What is the probability that the Token drawn has a number which is a multiple of 6 or 7?
A box contains 12 yellow marbles, ‘x’ blue marbles and 12 white marbles. A box contains 5 yellow marbles, 2 blue marbles and 3 white marbles. The ...
There are (m + 6) red roses, (m + 12) white roses and ‘m’ pink roses in a bag. If the probability of picking a pink rose is 4/15, then find the valu...
A bag contains 6 red, 4 green and 5 blue balls. Two balls are drawn at random without replacement. What is the probability that both balls are of differ...
12 Marbles and 12 balls are kept in a box. If 4 items are chosen at random, Find the probability that 2 is a marble and another 2 is ball
Three cards are drawn one after another with replacements from a standard deck of 52 cards. What is the probability of getting the first card a Queen, t...
