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NemiM [27]
2 years ago
13

The combined mean and variance of falary of 250 workers of city A and B are 560 and 5497

Mathematics
1 answer:
exis [7]2 years ago
7 0
I don’t know the answer to the question but I don’t know what to do with the question question but I don’t know what to do with the A 560
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Suppose that a high school marching band has 86 members. Of these 86 band members, 26 are seniors, 17 play the trumpet, and 4 ar
GalinKa [24]

Answer: 0.3023

Step-by-step explanation:

86 band members

26 are senior, 17 plays trumpet. If 4 are seniors and play trumpet, we solve this using the bayes theorem of conditional probability.

Probability of choosing band member that plays trumpet =17/86 = 2/43.

Probability of choosing a senior that plays trumpet = 4/26

Probability that a chosen member is a senior given that he plays trumpet = (2/43)/(4/26)

= 0.3023.

8 0
3 years ago
Val walks 2 3/5 miles each day.bill runs 10 once every 4 days.in 4 days.who covers the greater distance?
Mkey [24]

Answer: Val walks the greater distance. She walks 2/5 miles more than Bill. Hope this helps!

Step-by-step explanation:

6 0
2 years ago
Multiply the sum of -13/8 and 5/12 by their difference.​
REY [17]

Answer:

1421/576

Step-by-step explanation:

Sum = - 13/8 + 5/12 = - 39/24 + 10/24 = - 29/24

Difference = - 13/8 - 5/12 = - 39/24 - 10/24 = - 49/24

Sum * Difference = (-29/24)*(-49/24) = 1421/576

6 0
2 years ago
I NEED HELP ASAP PLEASE ILL GIVE YOU MORE POINTS HELPPP!:(
mina [271]

Answer:

1st one is 9

2nd one is 6

3rd one is 2

Step-by-step explanation:

6 0
2 years ago
Please help me i really need help please please
gizmo_the_mogwai [7]

Answer:

it's D all of the above

Step-by-step explanation:

.......

7 0
2 years ago
Read 2 more answers
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