Problems based on Numbers Test 6

Saurabh needs to answer correctly to score 60% over all
Total number of correct question to get 60% is 60% of 150.
=

60

100

×150=90 questions
Saurabh answered 80% of the first 75 questions correctly
So, 80% of 75 will be:

80×75

100

=60questions
He need 30 questions correct to get 60% marks overall out of 75 questions
Let x be the per cent.
Now, x % of 75 = 30

x

100

×75=30
x=

30×100

75

x=40%
He had to answer correctly 40% of the other 75 questions.