Define binomial distribution with parameters

Reference no: EM13119508

Binomial distribution with parameters
Suppose only 70% of all drivers in a certain state regularly wear a seat belt. A random sample of 500 drivers is selected. What is the probability that:

a) between 320 and 370 (inclusive) of the drivers in the sample regulary wear a seat belt
b) Fewer than 325 of those in the sample reqularly wear a seat belt? Fewer than 315?

Reference no: EM13119508

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