The answer to your question is option a
Mean means the average so you plus all the scores and divide that by the number of scores and when to undo that, the answer you get is a
Explanation is in a file
bit.
ly/3a8Nt8n
When writing fractions in simplest form, there are two rules to follow. First, ask if the numerator and denominator can be divided by the same number. Second, see if at least one number in the fraction is a prime number. We do as follows:
7500 / 320 / 20/20 = 375 / 16
If x ≡ 7 (mod 20), then
x ≡ 7 ≡ 27 ≡ 47 ≡ 67 ≡ 87 ≡ … (mod 20)
or equivalently, x = 7 + 20k for some integer k.
Taken mod 4, we have
x ≡ 7 + 20k ≡ 3 (mod 4)
and mod 5,
x ≡ 7 + 20k ≡ 2 (mod 5)
so that a = 3 and b = 2.
