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NCERT Class 11 - Math

Parvin Sinclair, G.P. Dikshit

Chapter 16

Probability - all with Video Answers

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Section 1

Introduction

01:16

Problem 1

Describe the sample space for the indicated experiment.
A coin is tossed three times.

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02:52

Problem 2

Describe the sample space for the indicated experiment.
A die is thrown two times.

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01:47

Problem 3

Describe the sample space for the indicated experiment.
A coin is tossed four times.

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01:07

Problem 4

Describe the sample space for the indicated experiment.
A coin is tossed and a die is thrown.

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01:14

Problem 5

Describe the sample space for the indicated experiment.
A coin is tossed and then a die is rolled only in case a head is shown on the coin.

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01:06

Problem 6

Describe the sample space for the indicated experiment.
2 boys and 2 girls are in Room $X$, and 1 boy and 3 girls in Room Y. Specify the sample space for the experiment in which a room is selected and then a person.

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01:16

Problem 7

Describe the sample space for the indicated experiment.
One die of red colour, one of white colour and one of blue colour are placed in a bag. One die is selected at random and rolled, its colour and the number on its uppermost face is noted. Describe the sample space.

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01:02

Problem 8

An experiment consists of recording boy-girl composition of families with 2 children.
(i) What is the sample space if we are interested in knowing whether it is a boy or girl in the order of their births?
(ii) What is the sample space if we are interested in the number of girls in the family?

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01:03

Problem 9

A box contains 1 red and 3 identical white balls. Two balls are drawn at random in succession without replacement. Write the sample space for this experiment.

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01:06

Problem 10

An experiment consists of tossing a coin and then throwing it second time if a head occurs. If a tail occurs on the first toss, then a die is rolled once. Find the sample space.

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01:43

Problem 11

Suppose 3 bulbs are selected at random from a lot. Each bulb is tested and classified as defective (D) or non - defective(N). Write the sample space of this experiment.

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01:35

Problem 12

A coin is tossed. If the out come is a head, a die is thrown. If the die shows up an even number, the die is thrown again. What is the sample space for the experiment?

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01:09

Problem 13

The numbers $1,2,3$ and 4 are written separatly on four slips of paper. The slips are put in a box and mixed thoroughly. A person draws two slips from the box, one after the other, without replacement. Describe the sample space for the experiment.

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01:31

Problem 14

An experiment consists of rolling a die and then tossing a coin once if the number on the die is even. If the number on the die is odd, the coin is tossed twice. Write the sample space for this experiment.

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01:08

Problem 15

A coin is tossed. If it shows a tail, we draw a ball from a box which contains 2 red and 3 black balls. If it shows head, we throw a die. Find the sample space for this experiment.

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01:51

Problem 16

A die is thrown repeatedly untill a six comes up. What is the sample space for this experiment?

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