Two unbiased coins are tossed once. What is the probability of g

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 Multiple Choice QuestionsShort Answer Type

171.

Two coins ar tossed once. Write the probability of getting.
(a) At least one head

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172. Find the probability of getting a head when a coin is tossed once. Also find the probability of getting a tail.
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173. A pair of coin is thrown once. Find the probability of (i) One Head, (ii) Two Tails.
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174.

Two coins are tossed simultaneously. Find the probability of getting.
(i) two heads, (ii) at least one head, (iii) no head.

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175. Two unbiased coins are tossed once. What is the probability of getting exactly one head.


If we toss two unbiased coins, then possible outcomes(s), are
S = { HH, TH, TT, HT }
⇒    n(S) = 4
Let A be the favourable outcomes of getting exactly one head, then
A = {TH, HT } i.e.,    n( A) = 2

Therefore,      P(A) = fraction numerator straight n left parenthesis straight A right parenthesis over denominator straight n left parenthesis straight S right parenthesis end fraction equals 2 over 4 equals 1 half.

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176. Justify the statement: “Tossing a coin is a fair way of deciding which team should get the batting first at the beginning of a cricket game.”
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177. A die is thrown once, find the probability of getting a prime number.
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178. A die is rolled once, find the probability of getting a number greater than 2.
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179. A die is thrown once. What is the probability of getting a number 5 or 6?
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180.

A die is thrown once. Find the probability of getting
(i)    an even number.
(ii)    a number greater than 3.
(iii)    a number between 3 and 6.

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