Question
14 Indians and 8 Chinese finish a job in 8 days. 14
Japanese and 6 Chinese finish the same job in 14 days. Given that the efficiency of each person of a particular nationality is same but different from others. One Indian, one Chinese and one Japanese will complete the work in?Solution
One day work of 14 Indians and 8 Chinese = 1/8 One day work of 14 Japnese and 6 Chinese = 1/14 Therefore, one day’s work of 14 Indian, 14 Chinese and 14 Japanese = 1/8 + 1/14 = (7 + 4)/56 = 11/56 Therefore, one day’s work of 1 Indian, 1 Chinese and 1 Japanese = 11/56 × 1/14 = 11/784 Therefore, number of days required by 1 Indian, 1 Chinese and 1 Japanese = 784/11 = 71*3/11 days
A box contains only three colors of balls- red, green and blue. What is the minimum number of balls that should be picked from the box to ensure that at...
A card is drawn randomly from a collection of total face cards. What is the probability that the drawn card is a Queen?
A box contains 5 white, 6 green, 3 red, and 5 yellow marbles. If three marbles are chosen randomly, what is the probability that all three selected marb...
What is the probability that a number selected from 1,2,3.......................68,69,70, is perfect square or a perfect cube?
Three persons. A, B and C. are given the same puzzle to solve. The probability that A, B and C will solve the puzzle is. 3/5., 2/3., and 1/4respectively...
A card is drawn randomly from a collection of total face cards. What is the probability that the drawn card is a jack?
5 coins are tossed together. What is the probability of getting exactly 3 tails?
A fair coin is tossed 6 times. What is the probability of getting exactly either two or three heads?
A container holds A orange balls and 8 brown balls. If two balls are picked randomly without replacement, and the probability of ...
In a box there are 3 red, 6 blue, and 9 yellow cards. One card is picked up randomly. What is the probability that it is neither red nor yellow?
Relevant for Exams:
