Mathematics

Bullock

7 June, 20:02

Percentage grade averages were taken across all disciplines at a particular university, and the mean average was found to be 83.6 and the standard deviation was 8.7. If 18 classes were selected at random, find the probability that the class average is less than 80.

A. 0.7427

B. 0.0396

C. 0.0235

D. 0.1730

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