Sophia took a test with 21 questions. If she answered two sevenths of the questions correctly, how many did she get wrong?

Sophia took a test with 21 questions.

If she answered two sevenths of the questions correctly, number of correct answers she did: N = 21 x 2/7 = 6

=> Number of answers she got wrong: N = 21 - 6 = 15

Hope this helps!

:)

She wronged 15 questions.

Step-by-step explanation:

Given that she answer 2/7 correctly. So firstly, you have to calculate how many questions she answered correctly, you have to multiply it by 21 :

She has answered 6 questions correctly then the remaining questions are wrong. So you have to substract from the correct answer :

2 over 5

step-by-step explanation:

the 2: 3 ratio is the length of the ac segment to the cb segment total length. this implies that the ratio between segment ac length and segment ab length is 2: 5. point c is 2/5 from a to b, so the required fraction is 2/5.

answer: a and b

step-by-step explanation: