Answer:
Option A.
Step-by-step explanation:
It is given that out of 16 spins, a purple-and-red spinner landed on purple 9 times and on red 7 times..
Experimental probabilities are
Based on experimental probability, we need to find how many of the next 64 spins would we expect on land on red.
The expected number of red in 64 spins is
Therefore, the correct option is A.
Your first two tests add up to:
85 + 89 = 174
To average 87 for 3 tests, the tests need to add up to : 87 x 3 = 261
To average 91, the 3 tests need to equal: 91 x 3 = 273
So to average 87, the third test needs to be: 261 - 174 = 87
To average 91, the third test needs to be: 273 - 174 = 99
Your score needs to be between 87 and 99
Use the Pythagorean theorem. a^2+b^2=c^2
16^2+31^2=x^2
Then take the square root. You cannot do this theorem without squaring all of the numbers and taking the square root.