CLASS-10

BOARD: CBSE

Mathematic Worksheet - 14

TOPIC: Probability

For other **CBSE Worksheet for class 10 Mathematic** check out main page of Entrancei.

**FORMULA**

P(E) =(Number of trials in which the event happened)/(Total number of trails) |

**1. A bag contains 5 red, 4 blue and 3 green balls. One ball is drawn at random. Find the probability that the ball drawn is:**

a) blue

b) not red

c) either red or green

d) black

e) red and green.

**2. A dice is thrown once. Find the probability of getting:**

a) a number divisible by 3

b) a factor of 6

c) either 3 or 4

d) neither 2 nor 4

e) a number from 1 to 6

f) a number 7.

**3. Find the probability of having 53 Sundays in a leap year.**

**4. a) A batsman hits a boundary in 7 balls out of 28 balls. Find the probability that he doesn’t hit a boundary.**

b) The probability of winning a game is 0.65. What is the probability of losing it ?

**5. A child has a dice whose six faces show the letters as given below:**

A |
C |
B |
A |

**5. The dice is thrown once. What is the probability of getting:**

a) A

b) not B

c) C

d) Either A or B

e) not f) neither A nor B.

**6. From a well shuffled deck of 52 playing cards, a card is drawn at random. Find the probability of getting**

a. Anon-face card

b) either a face card or a red card

c) a red face card

d) a king of black suit

e) a diamond

f) either a spade or club.

**7. Two coins are tossed simultaneously. Find the probability of getting a) 2 heads b) 2 tails**

c) At least one head d) at most one tail.

**8. A box contains cards numbered from 1 to 20. A card is drawn at random. Find the probability that the card drawn bears:**

a) a prime number

b) an even number

c) a number divisible by 4

d) a factor of 20.

**9. In an interview one candidate is to be selected out of 5 male and 6 female candidates. Find the probability that the selected candidate is a:**

a) male

b) female

c) male or female

d) male and female.

**10. A box contains 3 red, 4 green and 6 purple marbles. One marble is taken out at random. Find the probability that the marble taken out is :**

a) green

b) not purple

c) either green or purple

**11. A card is drawn at random from a well shuffled deck of 52 cards. Find the probability of getting**

a) a black king

b) Neither heart nor a king

c) a black card and a king

d) a spade or a ace.

**12. A box contains 24 balls out of which some are green and others are red. If a ball is drawn from the probability of getting a green ball is 2/3. Find the number of red balls in the box.**