RRB Government Jobs Exams

A students average score in 10 tests is 78. What must be the students score on a 5th test for the overall average score to become 80?

a) 80
b) 84
c) 82
d) 88

Read Solution (Total 1)

till 5th test total score=78*5=390
for average score 80 in overall total number should be 80*5=400
he had to score(78+10)=88
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RRB Other Question

22) The present ratio of students and teachers at a certain school is 30 to 1. If the student enrolment is to increase by 50 students and number of teachers by 5, the ratio of teachers would then be 25 to 1. Find the present number of teachers.
a) 15
b) 8
c) 10
d) 15
25) If area of square region having sides of length 6 cms is equal to the area of rectangle region having width 2.5 cms, then length of rectangle in cms is:
a) 9.5
b) 14.4
c) 13.6
d) 8.5