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According to a consumer survey of young adults (18-24 years of age) who shop online, 24% own a mobile phone with internet access. In a

According to a consumer survey of young adults (18-24 years of age) who shop online, 24% own a mobile phone with internet access. In a random sample of 300 young adults who shop online, let x be the number who own a mobile phone with internet access. 

a. Find the probability of exactly 150 young adults owning a mobile phone.

b. Find the probability of less than 200 young adults owning a mobile phone. 

c. Find the expected number of young adults owning a mobile phone. 

d. Find the standard deviation of the number of young adults owning a mobile phone.

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