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Earn +20 ptsQ: How many 2 letter combinations are there?
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How many combinations of 2 can you get in 8 numbers?
There are 8*7/(2*1) = 28 combinations.
How many 5 letter combinations can be made from the alphabet if 3 are consonants and 2 are vowels?
There are 3 consonants from 21 and 2 vowels from 5. That gives 21C3 * 5C2 combinations = 21*20*19/(3*2*1) *5*4/(2*1) = 1330*10 = 13300 combinations in all.
How many combinations of 2 breads with or without lettuce and 5 toppings?
There are 2*2*5 = 20 combinations.
How many different combinations can you make out of 2 different things?
Two make combinations you would take 2x1=2 combinations only
How many combinations of 2 are there in 11 numbers?
There are 11C2 = 11*10/(2*1) = 55 combinations.
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