Class A has 13 pupils and class B has 12 pupils. Both classes sit the same maths test. The mean score for class A is 68. The mean score for both classes is 45. What is the mean score (rounded to 2 DP) in the maths test for class B?

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.

8 2/3 is the answer

step-by-step explanation: just use a calculator

d

step-by-step explanation:

answer: plz put a pic in so i can answer it

step-by-step explanation: