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inna [77]
3 years ago
7

Brainliest need help

Mathematics
1 answer:
erastova [34]3 years ago
4 0

Answer:

p(71 <  \times  < 85) \\  = p( \frac{71 - 78}{4}  < z <  \frac{85 - 78}{4} ) \\  = p( - 1.75 < z < 1.75) \\  =1 -  (\phi(1.75)) \\  = 0.46  \times 100\%\\  = 46\%

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