zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的 Word Problems >

you have two regular six sides dice you roll both dice at the same time what is the probability that the sum of the two dice rolls is greater than 7?

解答

yo u ha v e tw o re gu l a r s i x s i d es d i ce yo u ro ll b o t h d i ce a t t h e s am e t im e w ha t i s t h e p ro babi l i t y t ha t t h e s u m o f t h e tw o d i ce ro ll s i s g re a t er t han 7 ?

解答

\frac{5}{12}

+1

十进制

0.41666 \dots

求解步骤

The possible outcomes when two dice are rolled are

6 \cdot 6

Therefore, the number of possible outcomes:

6^{2}

Find the number of favorable outcomes of the sum of the 2 dice rolls is greater than 7:

15

Probability

= \frac{number of favorable outcomes}{total number of outcomes}

= \frac{15}{6 ^{2}}

\frac{15}{6 ^{2}} = \frac{5}{12}

= \frac{5}{12}

流行的例子

60% of what number is 18 Find two consecutive positive integers such that the square of the larger integer is nineteen more than nine times the smaller integer.The 半径 of a circle is 9 m. Find its area in terms of pipi.Amira is going to invest in an account paying an interest rate of 2.4% compounded continuously. How much would Amira need to invest, to the nearest dollar, for the value of the account to reach 320 in 17 years?9 less then half a number