Mohit is a teacher and he teach some students in two (Morning & evening) slots. There are 5 boys and ‘x’ girls in morning slot, while there are ‘x...
In a class, there are 16 boys and 24 girls. One of them is called out by an enroll number. What is the probability that the one called is a girl?
34 pens are there in a box where 10 are red pens, ‘p’ are blue pens and remaining are black pens. If a pen is picked, the probability of getting blu...
A letter is taken out at random from ‘CHACHAKE’ and another is taken out from ‘PATAKHE’. The probability that they are the same letter is
...A bag contains black and white balls, such that the probability of picking a black ball is 4/7. If the probability of picking two black balls without re...
A bag contains 13 white and some black balls. If the probability of drawing a black ball from the bag is twice that of drawing a white ball, find the nu...
A bag contains 6 balls of which 3 are red and 3 are black. They are drawn successively without replacement. What is the probability that colors are alt...
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...
The probability of selecting a rotten apple randomly from a heap of 250 apples is 0.20. What is the number of rotten apples in the heap?
...A bag contains 9 black and 10 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
