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sweet-ann [11.9K]
2 years ago
9

There are 15 players on a volleyball team. Only 6 players can be on the court for a game. How many different groups of players o

f 6 players can the coach make, if the position does not matter?
Mathematics
1 answer:
stealth61 [152]2 years ago
8 0

There are 5005 different groups

<h3>How to determine the number of groups?</h3>

The given parameters are:

Players, n = 15

Selected, r = 6

The number of groups is then calculated as:

Group = ^{n}C_r

This gives

Group = ^{15}C_6

Apply the combination formula

Group = \frac{15!}{9!6!}

Evaluate the expression

Group = 5005

Hence, there are 5005 different groups

Read more about combination at:

brainly.com/question/11732255

#SPJ1

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2 years ago
Bobby is testing the effectiveness of a new cough medication. There are 100 people with a cough in the study. Seventy patients r
Tresset [83]

Answer:

0.665

Step-by-step explanation:

Given:  100 people are split into two groups 70 and 30.  I group is given cough syrup treatment but second group did not.

Prob for a person to be in the cough medication group = 0.70

Out of people who received medication, 34% did not have cough

Prob for a person to be in cough medication and did not have cough

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Prob for a person to be not in cough medication and did not have cough

=\frac{0.3(20)}{30}=0.20

Probability for a person not to have cough

= P(M1C')+P(M2C')

where M1 = event of having medication and M2 = not having medication and C' not having cough

This is because M1 and M2 are mutually exclusive and exhaustive

SO P(C') = 0.397+0.2=0.597

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4 0
3 years ago
Read 2 more answers
A snowmobile traveled 32 miles in 2 1/3 hours.
laila [671]

Answer:

13.7 mph

Step-by-step explanation:

• d = st

Given:

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Find the rate s:

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Five thousand raffle tickets are sold for $5 each. 50 winnings numbers will be chosen, 40 of which will win $100 each and 10 of
Allisa [31]

Answer:

Step-by-step explanation:

Given

there are 50 winning number out of which 40 get $ 100 each and 10 wins $ 1000 .

let x denotes the winning from a randomly selected ticket

x=100\ with\ Probability\ \frac{40}{5000}

x=1000\ with\ Probability\ \frac{10}{5000}

Expected value is given by

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E(x)=0.8+2=2.8

and Expected return is given by

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=2.8-5=$ -2.2

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