Question

lily scored her first Spanish test are 96, 85, 90, 92. What test score must lily earn on the 5th test so that her mean will be exactly 90.

Answer 1

87

Explanation:

`(96+85+90+92+x)/(5) = 90\\`

`(353+x)/(5) = 90`

`353+x= 5(90)\\`

`353+x=450`

`x=87`