There are 12 people in a class. 10 are randomly chosen. How many possible combinations are there?
1 answer:
long way
12 x 11 x 10 x 9 x 8 x 7 x6 x5 x4 x3x2/ 10x9x8x7x6x5x4x3x2x
but you can shorten that by crossing out identical numbers so you get 12 x 11
12 x 11 = 132 combinations
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Correct the answer is -55
4x+12=90
4x=90-12
4x=8
x=8/4
x=2
The number pattern to that is multiply by 10.
Answer:
p = 5.50b
Step-by-step explanation:
2 beach balls cost 11
4 beach balls cost 22
6 beach balls cost 33
So each (1) ball b costs 5.50 ($) p
Your answer would be -13 !!!
