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palafox9898
21.04.2021 •
Mathematics
The multiplication rule of counting indicates that the product of the outcomes of each event gives the total number of possible outcomes for the series of all 5 events. There are 5 outcomes for the first city, 4 outcomes for second city, 3 outcomes for the third city, 2 outcomes for the fourth city, and 1 outcome for the final city.
Write the product of the outcomes.
(first city) · (second city) · (third city) · (fourth city) · (final city)
= 5 · 4 · 3 · 2
Note that factorial notation can be used here, since we have the product of consecutive decreasing counting numbers.
Recall that
n! = n(n − 1)(n − 2) 1.
Here,
n = 5
and
5! = 5 · 4 · 3 · 2
Step 3
Multiply to find the total number of possible outcomes.
5! = 5 · 4 · 3 · 2 · 1
= ?
So by the multiplication rule of counting, the sales representative has different choices for the order in which to visit the cities.
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Ответ:
Step-by-step explanation:
x = price of torch
y = price of battery
x + y = £2.50
x = y + 2
->
y + 2 + y = 2.50
2y = 0.50
y = 0.25
x = y + 2 = 0.25 + 2 = 2.25
what fraction of 2.5 is 0.25 ?
it is 0.25/2.5 = 1/10
the battery is 1/10 of the total price (or 10%).