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受欢迎的 Word Problems >

A die is rolled twice. Find the probability of getting both odd numbers

解答

A d i e i s ro ll e d tw i ce . F in d t h e p ro babi l i t y o f g e tt in g b o t h o dd n u mb ers

解答

\frac{1}{4}

+1

十进制

0.25

求解步骤

Find the probability of getting odd:

\frac{1}{2}

Find the probability of getting odd:

\frac{1}{2}

Since the events are independent, Use the formula

P (X_{1} \land X_{2} \land \dots \land X_{k}) = P (X_{1}) \cdot P (X_{2}) \cdot \dots \cdot P (X_{k})

= \frac{1}{2} \cdot \frac{1}{2}

\frac{1}{2} \cdot \frac{1}{2} = \frac{1}{4}

= \frac{1}{4}

流行的例子

Eight times a number is at least 16.Kendall puts 1,055.00 into an account to use for school expenses. The account earns 1% interest, compounded annually. How much will be in the account after 5 years?50 less than twice a number You deposit 3500 in a bank account that pays 8% annual interest. Find the balance after 13 years if the interest is compounded monthly.twelve times a number is 3 more than twice the sum of the number and 1