A club has 50 members of which 20 are freshman, 15 are sophomores, 10 are juniors and 5 are seniors. How many ways are there to select a president, a vice president, and a secretary if they cannot be from the same class?

5x+10 is the correct one

hope this

explanation:

step-by-step explanation:

yes.. it's proven to be 36.

134.6 us dollars

step-by-step explanation:

1 us dollar = 1.33 canadian dollars

so, 150 us dollars = 150 × 1.33 = $199.5.

in canada, the money mitchell spent = 20 canadian dollars.

remaining canadian dollars with him = 199.5 - 20 = 179.5.

after mitchell returned to us, he exchanged the remaining canadian dollars to us dollars.

179.5 canadian dollars = 179.5 × 0.75 = 134.6 us dollars.