Ntombi runs a business that manufactures sensors for self-driving vehicles. The prototype sensors are designed to have an average lifespan of 300 megameters with a standard deviation of 70 megameters (assume that this is the population mean and population standard deviation and that the lifespan distribution is normal). If 5 sensors are manufactures and tested, what is the probability that the average lifespan will be 380 megameters at most?

• A.

0.9948

• B.

0.9979

• C.

0.9726

• D.

0.9452

• E.

0.9875