Answer:

And we can use the probability mass function and we got:
Then the probability that all three have a smart phone is 0.091
Step-by-step explanation:
Let X the random variable of interest "number of students with smartphone", on this case we now that:
The probability mass function for the Binomial distribution is given as:
Where (nCx) means combinatory and it's given by this formula:
And we want to find this probability:

And we can use the probability mass function and we got:
Then the probability that all three have a smart phone is 0.091
Answer:
the answer is 36
Step-by-step explanation:
Follow the link below to help you
Answer:
$29.75(without tax) (I don't know if you need it with tax)
Step-by-step explanation:
Answer:
wait no, THANK YOUU <333
Step-by-step explanation: