Answer:3/20
Step-by-step explanation:
Heads=Boy
Tails=Girl
If the first 3 students are boys, all 3 coins must be heads.
Because in 3 of these experiments, the coins all land on heads, and there are 20 experiments completed, 3 out of the 20 experiments are 3 boys; 3/20.
Answer:
The last answer.
Step-by-step explanation:
It looks to be the correct answer because for the one above you can't simplify 27 by 5.
Answer:
455 or 680, depending
Step-by-step explanation:
If we assume the three choices are different, then there are ...
15C3 = 15·14·13/(3·2·1) = 35·13 = 455
ways to make the pizza.
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If two or three of the topping choices can be the same, then there are an additional ...
2(15C2) +15C1 = 2·105 +15 = 225
ways to make the pizza, for a total of ...
455 + 225 = 680
different types of pizza.
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There is a factor of 2 attached to the number of choices of 2 toppings, because you can have double anchovies and tomato, or double tomato and anchovies, for example, when your choice of two toppings is anchovies and tomato.
_____
nCk = n!/(k!(n-k)!)
8. commutative property of multiplication
9. associative property of multiplication
10.<span>Multiplicative </span><span> Property of Zero
11.</span><span>Identity Property of Multiplication
</span>12. commutative property of addition
13.associative property of multiplication
14.<span>Identity Property of Addition
15. </span>commutative property of addition
16. commutative property of multiplication
17.associative property of addition
18.Identity Property of Multiplication
19.associative property of addition
20.Identity Property of Addition
21.<span>Multiplicative </span> Property of Zero
22.associative property of multiplication
Answer:
55.5
Step-by-step explanation: