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Varvara68 [4.7K]
3 years ago
5

A radio disc jockey has 8 songs on this upcoming hours playlist: 3 are rock songs,2 are reggae, and 3 are country songs. The dis

c jockey randomly chooses the first song to play, and then she randomly chooses the second song from the remaining ones. What is the probability that both songs are reggae songs?
Mathematics
2 answers:
dimulka [17.4K]3 years ago
6 0
P (both songs are reggae songs)=2/8×1/7=2/56=1/28
ioda3 years ago
3 0
Answer:

The Probability That Both Songs Are Probably Reggae Is 2 Out Of 8. This Is Because Our Of All 8 Songs There Are Only 2 Reggae Songs So It Can Only Be Picked Twice
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Suppose that the middle 68% of speeding ticket fines on a highway fall between 93.18 and 118. Give an approximate estimate of th
Anton [14]

Answer:

The approximate estimate of the standard deviation of the speeding ticket fines is of 12.41.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

Middle 68% of speeding ticket fines on a highway fall between 93.18 and 118.

This means that 93.18 is one standard deviation below the mean and 118 is one standard deviation above the mean. That is, the difference between 118 and 93.18 is worth two standard deviations. So

2s = 118 - 93.18

s = \frac{(118 - 93.18)}{2}

s = 12.41

The approximate estimate of the standard deviation of the speeding ticket fines is of 12.41.

7 0
3 years ago
1 2/5 as an improper fraction
Mrrafil [7]
Answer: 7/5. . . . .
6 0
3 years ago
Matilda has been studying exponential functions in her algebra class and has started to notice a pattern.
dlinn [17]

Answer:

Most likely C

Step-by-step explanation:

This is most likely C because it always goes up and although a and c are the only ones with positive equations a makes you multiply by a decimal which can reduce the number so it's most likely C

4 0
3 years ago
What are the greatest common divisors of these pairs of integers?a. 3⁷. 5³. 7³,2ⁱⁱ.3⁵.5⁹b. 11.13.17, 2⁹.3⁷.5⁵.7³c. 23³ⁱ,23ⁱ⁷d. 4
KatRina [158]

Answer:

a) 3⁵5³.

b) 1

c) 23³

d) 41·43·53

e) 1

f) 1111

Step-by-step explanation:

The greatest common divisor of two integers is the product of their common powers of primes with greatest exponent.

For example, to find gcd of 2⁵3⁴5⁸ and 3⁶5²7⁹ we first identify the common powers of primes, these are powers of 3 and powers of 5. The greatest power of 3 that divides both integers is 3⁴ and the greatest power if 5 that divides both integers is 5², then the gcd is 3⁴5².

a) The greatest common prime powers of 3⁷5³7³ and 2²3⁵5⁹ are 3⁵ and 5³ so their gcd is 3⁵5³.

b) 11·13·17 and 2⁹3⁷5⁵7³ have no common prime powers so their gcd is 1

c) The only greatest common power of 23³ and 23⁷ is 23³, so 23³ is the gcd.

d) The numbers 41·43·53 and 41·43·53 are equal. They both divide themselves (and the greatest divisor of a positive integer is itself) then the gcd is 41·43·53

e) 3³5⁷ and 2²7² have no common prime divisors, so their gcd is 1.

f) 0 is divisible by any integer, in particular, 1111 divides 0 (1111·0=0). Then 1111 is the gcd

5 0
3 years ago
13 inches = __ ft<br> PLS HELP PLS
Radda [10]

Answer:

1.083

Step-by-step explanation:

5 0
3 years ago
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