Answer:
Step-by-step explanation:
Taking $50 each month causes - $50 change to bank balance
<u>Repeating same for 7 month:</u>
Correct option is B
Answer:
95.4% of family vehicles is between 1 and 3 years old.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 2
Standard Deviation, σ = 6 months = 0.5 year
We are given that the distribution of age of cars is a bell shaped distribution that is a normal distribution.
Formula:

P(family vehicles is between 1 and 3 years old)

95.4% of family vehicles is between 1 and 3 years old.
1. H+S=40
2. 19H+25S=922
From 1,
19H+19S=760
Subtract this from 2 to eliminate H,
19H+25S-19H-19S=922-760
6S=162
Solve for S, then use either equation to solve for H.