Question
The average number of taxis of three colours (black,
white and yellow) in a taxi stand is 144. The number of black taxis is 30 more than that of yellow taxis. The total number of black and white taxis is 255. Find the number of white taxis in a taxi stand.Solution
Let the number of white taxis be ‘x’ Therefore, number of black taxis = (255 – x) Number of yellow taxis = (255 – x – 30) = (225 – x) According to the question, 225 – x + 255 – x + x = 144 × 3 Or, x = 48
- ‘A’ and ‘B’ play a game where a coin is tossed 2 times. ‘A’ wins if both tosses give the same result. Find the probability that ‘A’ wins.
There are 'x' one-rupee coins, 'x + 5' two-rupee coins, and 'x - 5' five-rupee coins in a purse. Two coins are drawn from the purse without replacement,...
Two cards are drawn together from a pack of 52 cards. The probability that one is a club and one is a diamond?
The probability that Ayush passes the test is (4/11) and the probability that Bhavna fails is (3/8). What is the probability that both get the same result?
- A bag contains ‘x’ blue balls and 9 yellow balls. If the probability of getting a blue ball is 3/4, then find the probability of getting different colo...
24 defective pens are accidentally mixed with 120 good ones. It is not possible to just look at a pen and tell whether or not it is defective. On...
The probability of selecting a rotten egg randomly from a basket of 600 eggs is 0.14. What is the number of rotten eggs in the basket?
18 rotten bananas are accidentally mixed with 132 good ones. It is not possible to just look at a banana and tell whether or not it is rotten. One banan...
A game consists of tossing three coins once and then rolling two dice. Find the probability of getting exactly two heads in the coin toss and a sum equa...
A bag contains 4 red and 3 blue balls. Two balls are drawn at random without replacement. Find the probability that both balls are of the same colour.
Relevant for Exams:
