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astra-53 [7]
3 years ago
11

Please help me with this

Mathematics
1 answer:
sesenic [268]3 years ago
5 0
Ok so the average is 50

average of x number of things is
(add value of all things)/x=average

4 test scores needed
so divide by 4
3 test scores ar known
average is 50
x= missing score

(43+48+42+x)/4=50
times 4 both sides
133+x=200
minus 133 both sides
x=67

a score of 67 is needed
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