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Probability

Short Answer Type

441. Three coins are tossed once. Find the probability of getting 3 tails.

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442. Three coins are tossed once. Find the probability of getting exactly two tails.

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443. Three coins are tossed once. Find the probability of getting no tail.

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444. Three coins are tossed once. Find the probability of getting atmost two tails.

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445. A die is thrown, find the probability of the following event:
A prime number will appear.

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446. A die is thrown, find the probability of the following event:
A number greater than or equal to 3 will appear.

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447. A die is thrown, find the probability of the following event:
A number less than or equal to one will appear.

A die is thrown.
∴ The sample space is: S = {1, 2, 3, 4, 5, 6}
$rightwards double arrow$ n(S) = 6
Event: a number less than or equal to one will appear.
$rightwards double arrow$ $space straight A equals left curly bracket 1 right curly bracket space rightwards double arrow space straight n left parenthesis straight A right parenthesis equals 1$
Hence, $straight P left parenthesis straight A right parenthesis space equals space fraction numerator straight n left parenthesis straight A right parenthesis over denominator straight n left parenthesis straight S right parenthesis end fraction equals 1 over 6$

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448. A die is thrown, find the probability of the following event:
A number more than 6 will appear.

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449. A die is thrown, find the probability of the following event:
A number less than 6 will appear.

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450. A fair coin with 1 marked on one face and 6 on the other and a fair die are both tossed. find the probability that the sum of numbers that turn up is 3.

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Previous Year Papers

Test Series

Test Yourself

Short Answer Type

447. A die is thrown, find the probability of the following event:A number less than or equal to one will appear.

447. A die is thrown, find the probability of the following event:
A number less than or equal to one will appear.