Question

Giving a test to a group of students, the grades and gender are summarized below ABCTotalMale2142036Female10111233Total12253269

Answer 1

We need to find the following probability:

`P(male\text{ AND got a B\rparen}`

From the given table, we can see there are 14 student which are male and got a B and the total number of students is 69:

Since the probablity is defined as the number of favorable outcomes divided by the total number of outcomes, we get

`P(male\text{ AND got a B\rparen=}(14)/(69)=0.20289`

Then, by rounding to 3 decimal places, the answer is 0.203