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nell1234565
13.02.2021 •
Mathematics
Patty rolls a six-sided number die 120 times. How many times should she expect to roll a prime number?
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Ответ:
Answer is 60 times.
Explanation:
Prime numbers in a die are 2, 3 and 5 (i.e. 3 numbers)
Total outcomes can be 1, 2, 3, 4, 5 and 6 (i.e. 6 numbers)
Probability
= Number of preferred outcomes/ Total number of outcomes
= 3/6
= 1/2
= 0.5
Probability of getting a prime number while throwing the dice 120 times
= 0.5 × 120
= 60 times
Ответ:
C
Step-by-step explanation:
Change the mixed numbers to improper fractions
4
= ![\frac{21}{5}](/tpl/images/0471/8284/41e49.png)
8
= 8
= ![\frac{41}{5}](/tpl/images/0471/8284/0c567.png)
Replace ' of ' by multiplication
=
× ![\frac{41}{5}](/tpl/images/0471/8284/0c567.png)
=
=
→ C