Answer:
the cube root of 64 is 3√64=4.
Step-by-step explanation:
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N = 20, r = 15;
n C r = ( n * ( n - 1) ( n - 2 ) ... ( n - r + 1 )) / r ! =
20 C 15 = (20 * 19 * 18 * 17 ......8 * 7 * 6) / (15 * 14 * 13 ...* 5 * 4 * 3 * 2 * 1) =
= 15,504
Answer:
They can choose 15 questions in 15,504 ways.
OK so the factor of 10 is 1 times 10 and 5 times 2
On a 10 by 4 grid, there would be 40 squares. If you were to shade 12 of those squares, it can be shown as the fraction:
12/40 = 0.3
to get a percentage, we would have to multiply by 100
30% is to be shaded
