Answer:
5
Step-by-step explanation:
11-6=10-x
11-6-10=-x
-5=x
11-6=10-5
12 girls for every 5 boys
boys is second so it shouldb be indenomenaotr (bottom)
girls/boys
12girls/5boys=2.4girls/boy
answer is B
Answer:

Step-by-step explanation:
Given



Required

First, we calculate the z score

So, we have:




So:

From z score probability, we have:

Answer:
30.4
Step-by-step explanation: