Question

In an examination of n questions, students replied 15 out of the first 20 questions correctly.of the remaining question.he answered one-third correctly.all the question have the the same credit. If the student gets 50%marks,the value of n is

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

15+1/3(n-20)=50% of n

15+n/3-20/3=50/100*n

15-20/3=n/2-n/3

25/3=3n-3n÷6

25/3=n/6

n=50