Question
The age of Manish is half of that of his mother. His
mother is 9 years younger to his father, and Manish is 7 years older than his sister. The age of his father is three times that of his sister, what is the age of Manish?Solution
Let Age of Manish's Mother = X Age of Manish = X/2 Age of Manish's father = X + 9 Age of Manish's Sister = (X/2) β 7 The age of his father is three times that of his sister β X + 9 = 3 {(X/2) β 7) β X + 9 = 3X/2 β 21 β X + 9 = 1.5X β 21 β 9 + 21 = 1.5X β X β 0.5X = 30 β X = 60. Age of Manish = X/2 = 60/2 = 30 Years.
A bag contains 5 red, 7 blue, and 8 green balls. One ball is drawn at random. Find the probability it is not green.
17 rotten bananas are accidentally mixed with 120 good ones. It is not possible to just look at a banana and tell whether or not it is rotten. One banan...
A bag contains x orange balls, (x + 5) purple balls and (x + 7) green balls. If probability of getting a purple ball is 1/15 more than that of getting a...
Roger Federer gets a chance of 60% to win 1st set of tennis and Andy Murray gets a chance of 55% to win 2nd set of tennis. In what Percent of cases are ...
A is trying to break a bulb by throwing balls at it. If he hits the bulb 3 times in every 10 throws and bulb breaks 3 times out of 13 hits, then find th...
- If 4 cards fall out while shuffling a deck of 52 cards, what is the probability that all of them are aces?
1. 1/ 52 C 4
2. 4/ 52... A bag contains 13 white and some black balls. If the probability of drawing a black ball from the bag is 3 times that of drawing a white ball, find the ...
A bag contains 10 white and some black balls. If the probability of drawing a black ball from the bag is 2 times that of drawing a white ball, find the ...
A box contains 4 red, 5 blue and 3 green balls. Two balls are drawn at random without replacement. Find the probability that both balls are of the same ...
A box of bulbs is inspected by examining three randomly selected bulbs drawn without replacement. If all the three bulbs are non-defected, the box is ap...