The ratio is 14:5, as 42 divided by 3 is 14 and 15 divided by 3 is 5.
1) I put them in two separate brakets.
2) I solved it by equating both of them.
Answer:
B
Step-by-step explanation:
First thing to do here is to calculate the z-score
Mathematically;
z-score = (x-mean)/SD
here, x = 130, mean = 120 and SD = 10
Substituting these values
z-score = (130-120)/10 = 10/10 = 1
So the probability we want to calculate is;
P(z ≥ 1) = 1 - P(z <1)
From standard score table, P(z <1) = 0.15866
P(z ≥ 1) = 1-0.15866 = 0.84134
Answer: 12
Step-by-step explanation: Since 11 is ruled out, answer is 12 people
