Question #ab1e5

1 Answer
Jun 4, 2016

Answer:

(a) #120#

Explanation:

Let Mr. Kashif should get in the next test#=x#
We know that total of #6# tests#="Average"xx"number of tests"#
Total of #6# tests#=50xx6=300#
#:.# Total of #7# tests#=300+x#

Also to maintain an average of #60# required total of #7# tests #=60xx7=420#

Equating the two for #7# tests
#300+x=420#
or #x=420-300=120#