Answer:
The probability of the spinner landing on A is 0.1111.
Step-by-step explanation:
The possible outcomes of a board game is that it can lead on any three of the regions, A, B and C.
The probability of all the outcomes of an event sums up to be 1.

According to the provided information:
P (B) = 3 P (A)
P (C) = 5 P (A)
Compute the probability of the spinner landing on A as follows:

Thus, the probability of the spinner landing on A is 0.1111.
Step-by-step explanation:
commision = 7% of $9000
commision = 7/100 * $9000
commision = $630
48/100 (simplified: 6/25) - Fraction form
.48 - decimal form
48% - percent form
3,500 (.024) = 84
84 (5) = $420 in simple interest