Question

A student who scored 30% marks in the first paper of Physics out of 180 marks. huis to get
an overall score of at least 50% in two papers. TheScound paper is of 150 marks.
The percentage of marks he should score in the second paper to get the overall
average score is
(1)80%
(2)76%
(3)74%
(4)70%

Answer 1

the right answer is (3) 74%

Answer 2

HEY MATE HERE IS YOUR ANSWER.

option ( c ) is the correct answer 74%
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Average = total score / number of tests 

total score = 180 + 150 = 330 
50% average = 330 * 0.5 = 165 ( he needs to score this ) 
He has scored 30% in the first test with 180 marks 
so he has already scored 0.3 * 180 = 54 
Now He needs to score 165-54 = 111 in the second test. 

So the precentage = 111/150 = 74 

( 0.74 * 150 = 74 * 1.5 = 74 + 74/2 = 74 + 37 = 111 )

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hOpe It helps u.
thnk u.