In an examination of `n` questions, a student replied 15 out of the first 20 questions correctly.of the remaining questions, he answered one-third correctly. All the questions have the same credit. If the student gets 50% marks, the value of `n` is a.20 b. 40 c. 50 d. 100

In a test consisting of 120 questions ,a candidate correctly answer 60% of the first 90 questions .What percentage of the remainning questions does he need to answer correctly so that his answer to 55% of the total questions in the test are correct ?

In a test consisting of 120 questions, a candidate correctly answer 60% of the first 90 question. What percentage of the remaining questions does he need to answer correctly so that his answer to 55% of the total questions in the test are correct?

An examination consists of 80 questions carrying 1 mark each. Arpita answered 65% of first 40 questions right. Find the percent of questions she needs to get right in remaining questions to score 75% in the examination.

On a test consisting of 250 questions,Jassi answered 40% of the first 125 questions correctly.What percent of the other 125 questions does she need to answer correctly for her grade on the entire exam to be 60%?60 b.75 c.80d.cannot be determined e.none of these

In an examination a student has to answer 4 questions out of 5 questions; questions 1 and 2 are however compulsory.Determine the number f ways n which the student can make the choice.

In an examination a student has to answer 4 questions out of 5 questions; questions 1 and 2 are however compulsory. Determine the number f ways n which the student can make the choice.

In a test there are total n questions.Bhanu answers 20 out of 25 questions correctly in the first section.In the second section he answers 60% question correct and thus his total score is 66.66% in the test.Given that all the questive marking.The total no.of question in the test is :