PROBABILITY (revision)

PROBABILITY

Q1. Nidhi and nisha are two friends .What is the probability that will have

A) Same birthday

B) Different birthday (ignore the leap year )

Q2. Tom was born in Feburary 2000. What is the probability that he was born on 13^th Feb ?

Q3. Are the following outcomes equally likely or not ? A baby is born “it is a boy or a girl”

Q4. A letter is selected from the letter of word MATHEMATICS . What is the probability that it is M ?

Q5. Find the probability of getting 53 Sundays in a

A) Leap year

B) Non leap year .

Q6. In a lottery there are 10 prizes and 25 blanks. Find the probability of getting a prize.

Q7. What is the probability of sure and certain event ?

Q8. Write a sample space of

A) Tossing a coin

B) Throwing a die.

Q8. Two coins are tossed once. Find the probability of getting

A) Exactly one head

B) Almost one head

Q9. Someone is asked to take a number from 1 to 100. Find the probability  that it is not a prime number.

Q10. Out of 400 bulbs in a box 15 bulbs are defective . One bulb is taken out at random from the box. Find the probability that the drawn bulb is not defective.

Q11. If a number x is chosen from a number 1,2,3, and a number y is selected from the numbers 1,4,9. Find the probability that xy=10.

Q12. A number is selected at random from the numbers 3,5,5,7,7,7,9,9,9,9. Find the probability that the selected number is their average .