Question

sheila has taken five tests so far this semester. if she gets a 70 on her next test, it will lower the average of her test scores by four points. what is her average now?
What is "Tribhuwan"? It does not look like a school subject to me. Are you studying math, statistics?
If her average now is x, then her total points so far are 4x. So, we have

(4x+70)/5 = x-4
x = 90

(5x+70)/6 = x-4
x = 94

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