Alex wants to calculate his term mark in mathematics. It is to be based on 6 assignments, all equally weighted. He scored 82%,74%,66%, 83%, and 75% on his first five assignments. What mark will Alex need on his sixth assignments in order to achieve a term mark of 80%?

Nann

Nann

Answered question

2021-03-02

Alex wants to calculate his term mark in mathematics. It is to be based on 6 assignments, all equally weighted. He scored 82%,74%,66%, 83%, and 75% on his first five assignments. What mark will Alex need on his sixth assignments in order to achieve a term mark of 80%?

Answer & Explanation

Nichole Watt

Nichole Watt

Skilled2021-03-03Added 100 answers

Let x be the score he needs to receive on the sixth assignment. If the needs a mean score of 80%, then:
mean score=sun of his scores/number of scores/number
80%=82%+74%+66%+83%+75%+x6
80%=380%+x6
480%=380%+x
100%=x
He must then score 100% on his sixth assignment to achieve an 80% for the the term.

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