vi

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Phổ biến Word Problems >

if you roll a dice twice what is the probability of rolling a 1 the first time and 2 the second time

Lời Giải

i f yo u ro ll a d i ce tw i ce w ha t i s t h e p ro babi l i t y o f ro ll in g a 1 t h e f i rs t t im e an d 2 t h e seco n d t im e

Lời Giải

\frac{1}{36}

+1

Số thập phân

0.02777 \dots

Các bước giải pháp

Find the probability of rolling a 1 the first time:

\frac{1}{6}

Find the probability of 2 the second time:

\frac{1}{6}

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}{6} \cdot \frac{1}{6}

\frac{1}{6} \cdot \frac{1}{6} = \frac{1}{36}

= \frac{1}{36}

Ví dụ phổ biến

The radius of a circle is 9cm Using 3.14 as an approximation for pi , find the chu vi.three subtracted from the product of 4 and a number is less than 29 Write the equation used to solve the following problem. Robert’s father is 4 times as old as Robert. After 5 years, father will be three times as old as Robert. Let x= Robert's age Joe and Beth deposit 4,187.00 into a savings account which earns 12.89% interest compounded monthly. They want to use the money in the account to go on a trip in 3 years. How much will they be able to spend?Shawn opened a savings account 1 year ago. The account earns 4% interest, compounded continuously. If the current balance is 100.00, how much did he deposit initially?