Campus Maths Puzzle Numerical Ability Averages

a students average test score on 4 tests is 78.what must be the students scoe on 5th test for the students avg score on the 5th test to be 80

Read Solution (Total 1)

88

Total score upto 4th test = 4*78 = 312
Let x be the score of students in 5th test, then average score after 5th test=(312+x)/5=80
=> 312+x = 400
=> x = 88
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Campus Other Question

find the number which when added to itself 13 times gives 112 8) There is a set of 36 distinct points on a plane with the following characters
There is a subset of A consisting of 14 collinear points
Any subset of 3 or more collinear points from the are a subset of A
How many distinct D will positive area can be formed with each other of its
vertices being one of the 36 points? (the triangle are said to be distinct if at least
one of vertices is different.
a)7140 b) 47774 c)1540 d)6776