Answer: 
<u>Step-by-step explanation:</u>
There are 61 boys --> 38 girls
A) 19 chose football: 5 are girls --> 14 are boys
B) 38 girls: 28 chose running, 5 chose football --> 5 girls chose tennis
C) 31 students chose tennis: 5 are girls --> 26 are boys.
D) 61 boys: 14 chose football, 26 chose tennis --> 21 boys chose running.

Total running = 21 boys + 28 girls = 49
Total students = 99

Radius = 3 units
Using pi as 3.132
Area of circle =

= 3.142 x 3 x 3 = 28.278 square units ≈ 28.28 square units
OR if you use the calculator and press pi x 3 x 3 = 28.27square units
Answer:
Brian had $30 initially.Brian had $30 initially.
Step-by-step explanation:
WE are given the following in the question:
Let Brian have x dollars and Colin have y dollars.
Ration of Brian's money to Colin's money is 5:1. This, we can write the equation:

"Brian spent £27 that day. Brian now had £3 less than Colin."
Thus, we can write the equation:

Solving the two equation by substitution, we get,

Thus, Brian had $30 initially.