External angle is equal to the sum of the other 2 internal angles
2x=x-5+63
minus x from both sides
x=-5+63
x=58
x=58°
Give brainlest please i will do anything the answer is 48
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