Ms. Davis is doing an activity with her statistics students where she gives them a 202020-question multiple choice test, and they know none of the answers. Students need to guess on every question, and each question has 555 possible choices, 111 of which is correct. What are the mean and standard deviation of the number of questions that each student gets correct?
You may round your answers to the nearest tenth.

The mean and standard deviation of the number of questions that each student gets correct are 4 and 1.789 respectively (

6 paintings

Step-by-step explanation:

we know that

1) First day

The first day he sells 1/4th of the total

so

Sell 16 paintings

Remaining=64-16=48 painting

2) Second day

He sells one-half of the paintings he started the day with

He started the day with 48 painting

so

Sell 24 paintings

Remaining=48-24=24 paintings

3) Third day

He sells one-half of the paintings he started the day with

He started the day with 24 paintings

so

Sell 12 paintings

Remaining=24-12=12 paintings

4) Fourth day

He sells one-half of the paintings he started the day with

He started the day with 12 paintings

so

Sell 6 paintings

Remaining=12-6=6 paintings