1.(4/9)^2=(4/9)(4/9)=16/81 2. Make all denominators the same so 1/3=6/18 2/9=4/18 and finally, 1/2=9/18 3. Add the three fractions together to get 19/19 which is just 1 however for this question we shall leave it as 19/19 4. Remember KFC so our question becomes 16/81 x 19/19 5. Work this out as 16/81
mean=average. to get average, you add up the numbers and divide by how many numbers. they add upp to 288 and since theres 4 test grades, divide by 4 to get 72.
