Can you explain why as well? There's a picture.

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1 Answer
Jul 21, 2018

196196.

Explanation:

Let t_mtm denote the score in the m^(th)mth test.

Then, by given, 86=(t_1+t_2+t_3+t_4)/4.86=t1+t2+t3+t44.

:. t_1+t_2+t_3+t_4=4xx86=344...............(star_1).

We are required to find t_5+t_6, such that,

(t_1+t_2+t_3+t_4+t_5+t_6)/6=90,

or, t_1+t_2+t_3+t_4+t_5+t_6=6xx90=540...(star_2).

Utilisig (star_1)" into "(star_2), we have,

t_5+t_6=540-344=196.