Question
A scored 30% marks and failed by 40 marks whereas B
scored 60% marks, which was 80 more than the passing marks of the examination. Find the total marks of the examination.Solution
Let the total available marks in the examination be 100x. Marks scored by A = 30% of 100x = 30x Marks scored by B = 60% of 100x = 60x According to question, => 30x + 40 = 60x – 80 => 30x = 120 => x = 4 Total marks of the examination = 100x = 400
A box contains Z black balls and 7 white balls. If two balls are drawn at random, one after another without replacement, and the ...
A box contains 6 red, 4 blue, 2 green and 4 yellow pens. Two pens are picked at random, what is the probability that one is blue and one is yellow?
The probability of selecting 2 one-rupee coins from a collection of 'a' one-rupee coins and 4 two-rupee coins is 1/3. Determine the probability of rando...
A coin is tossed four times one by one. What is the probability of getting a tail for the first time, head for the second time and again head for the th...
Two cards are drawn at random from a pack of 52 cards. What is the probability that either both are black or both are queens?
A bag contains 12 black and 14 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
5 coins are tossed together. What is the probability of getting exactly 3 tails?
A bag contains 15 white and some black balls. If the probability of drawing a black ball from the bag is thrice that of drawing a white ball, fin...
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?
The probability of selecting a rotten apple randomly from a heap of 100 apples is 0.20. What is the number of rotten apples in the heap?
...
Relevant for Exams:
