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प्रश्न
A dice is thrown once. Find the probability of getting a number between 3 and 8.
उत्तर
Sample space = {1, 2, 3, 4, 5, 6}
n(S) = 6
E = the possible even numbers between 3 and 8 = {4, 5, 6}
n(E) = 3
Probability of getting an even number between 3 and 8 = P(S)
= `("n"("E"))/("n"("S"))`
= `3/6`
= `1/2`
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संबंधित प्रश्न
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(1) The sum of numbers on their upper faces is at least 10.
(2) The sum of the numbers on their upper faces is divisible by 5.
(3) The number on the upper face of the first die is greater than the number on the upper face of the second die.
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Activity:
Two coins are tossed simultaneously.
∴ Sample space is
S = `{square, HT, TH, square}`
Event A: To get at least one head.
∴ A = `{square, HT, TH}`
Event B: To get no head.
∴ B = `{square}`
Assertion (A): A die is thrown once and the probability of getting an even number is `2/3`.
Reason (R): The sample space for even numbers on a die is {2, 4, 6}.
