Question

40% of the students in a class failed in a test. They had to sit for another test in which 70% of them failed again. Find the percentage of students who failed in both tests.

Answer 1

i think its the average of the two

Answer 2

is it? you sure? ....

Answer 3

it the where x students in total
0.4x+0.7x =1.1x
so this is 1.1x/x=1.1 ie 110%

Answer 4

not sure

Answer 5

this is multiple choice question.

the choices:
10%
12%
18%
28%
30%

Answer 6

oh wait the 70 % is not from total

Answer 7

so
0.4x
and 70% of that is
(0.4x)0.7=0.28x

Answer 8

0.28

Answer 9

28%

Answer 10

ohh, i see. thanks. i know how to do now.