B MATHS ZONE | Kishan Sir

In a group of 400 people, 160 are smokers and non-vegetarian; 100 are smokers and vegetarian and the

When a missile is fired from a ship, the probability that it is intercepted is 𝟏/𝟑 and the probabili

The probability that two randomly selected subsets of the set {1,2,3,4,5} have exactly two elements

Let Bi(i = 1,2,3) be three independent events in a sample space. The probability that only B1 occurs

An ordinary dice is rolled for a certain number of times. If the probability of getting an odd numb

A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box

(i) A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at random from the lot. What is

12 defective pens are accidentally mixed with 132 good ones. It is not possible to just look at a

Five cards - the ten, jack, queen, king and ace of diamonds, are well-shuffled with their face downw

A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers

One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting (i) a king

A die is thrown once. Find the probability of getting (i) a prime number (ii) a number lying between

Gopi buys a fish from a shop for his aquarium. The shopkeeper takes out one fish at random from a

A piggy bank contains hundred 50p coins, fifty 1 coin, twenty 2 coins and ten 5 coins. If it is equa

A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the

A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the

It is given that in a group of 3 students, the probability of 2 students not having the same birth

A bag contains lemon flavoured candies only. Malini takes out one candy without looking into the

If P(E) =0.05, what is the probability of ‘not E’?

Which of the following cannot be the probability of an event? (A) 2/3 (B) -1.5

Why is tossing a coin considered to be a fair way of deciding which team should get the ball at the

Which of the following experiments have equally likely outcomes? Explain. (i) A driver attempts

1. Complete the following statements : (i) Probability of an event E + Probability of the event

Let in a Binomial distribution, consisting of 5 independent trails, probabilities of exactly 1 and 2

Let a computer programme generate only the digits 0 and 1 to form a string of binary numbers with pr

Let there be three independent events E1, E2 and E3. The probability that only E1 occurs is 𝜶, only

Two dices are rolled. If both dices have six faces numbered 1,2,3,5,7 and 11, then the probability

Let A denote the event that a 6-digit integer formed by 0,1,2,3,4,5,6 without repetitions, be divis

A pack of cards has one card missing. Two cards are drawn randomly and are found to be spades. The p

Two dice, one blue and one grey, are thrown at the same time. Write down all the possible outcomes