Here we go again. This was from Virtual Meet #3.
16) A person is going to buy 8 pieces of fruit among oranges, apples, and bananas. He must buy at least 2 oranges. Also, he must buy at least as many bananas as apples. How many different combinations of fruit can he buy?
Answer: E)16
20) Using Blaise Pascal's triangle and letting the 1 at the top be row 1, determine how many odd numbers are in row 11.
Answer: D)4
I was wondering if there was a faster way to do it besides drawing the whole triangle all the way to row 11.
50) How many proper fractions are reduced completely with a denominator of 360?
Answer: D)96
Quick way to do it?
Thanks!