Answer:
B
Step-by-step explanation:
a rational number is a number that can be expressed as a fraction p/q of two integers, q cannot be 0
so for A
Cannot be expressed as 2 integers as a quotient
so A is wrong
For B .125 is 1/8 so yes -2 is a integer so yes 2/5 are 2 integers so yes
and 
Is 4/3 so yes
B
Answer:
The probability that 12 people in your sample are carrying no cash is 0.0712
Step-by-step explanation:
n = 100
p(no cash) = 0.09
x = 12
By applying binomial distribution
P(x,n) = nCx*px*(1-p)(n-x)
P(x = 12) = 0.074.
The probability that 12 people in your sample are carrying no cash is 0.074.
n = 100
p(less than 50) = 0.78
x = 75
By applying binomial distribution
P(x,n) = nCx*px*(1-p)(n-x)
P(x = 75) = 0.0712
The probability that 12 people in your sample are carrying no cash is 0.0712
Hey :) it’s (2,5) it’s C !!
