Question

doubt about this question

Answer 1

Answer:82

Step-by-step explanation:

Option 1 file is attached already

Answer 2

Answer:

Step-by-step explanation

I think question is wrong take six instead of five subjectt

Average of five subjects is

X=(z)/5__(2)

Average of 6 subjects is

X-2=(z+72)/6__(1)

6x-12=z+72___(1)

5x=z___(2)

X=84.