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bekas [8.4K]
3 years ago
9

After 5 tests Dara's average score was 88 what score must she average on the next two tests to have a seven-test average of 90?

Mathematics
1 answer:
Tomtit [17]3 years ago
3 0

After 5 tests, her average was 88. To have a seven-test average of 90, the total must be:

90 \times 7 = 630

Her average after 5 tests was 88. Her total score on the 5 tests is:

88 \times 5 = 440

Subtract:

630-440 = 190

Find the average by dividing by 2:

190 \div 2 = 95

Her average must be 95

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