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tigry1 [53]
3 years ago
8

In a class of 30 students, 7 play an instrument and 19 play a sport. There are 4 students who play an instrument and also play a

sport. What is the probability that a student chosen randomly from the class plays an instrument?
Mathematics
2 answers:
Law Incorporation [45]3 years ago
5 0

Answer:

1/20

Step-by-step explanation:

Doss [256]3 years ago
3 0

Answer:

7/30

Step-by-step explanation:

You might be interested in
The life expectancy in the US is 75 with a standard deviation of 7 years. A random sample of 49 individuals is selected. What is
victus00 [196]

Answer:

0.02275

Step-by-step explanation:

We use this z score formula to solve for this question

z-score is is z = (x-μ)/σ/√n

where x is the raw score

μ is the population mean

σ is the population standard deviation

From the above question,

x = 77

μ = 75

σ = 7

number of samples = 49

Hence, the z score = 77 - 75/ (7/√49)

= 2/(7/7)

= 2/1

= 2

Hence, the z score = 2

Using the z table to find probability

P(x<77) = 0.97725

P(x>77) = 1 - P(x<77)

= 1 - 0.97725

= 0.02275

Therefore, the probability that the same mean will be larger than 77 years

is 0.02275

7 0
3 years ago
bob has 64 cups. could he distribute them into 6 equally in stacks and not have any left over? Explain
Iteru [2.4K]

Bob cannot distribute the cups in six equal stacks and not have any left over.

Step-by-step explanation:

In order to divide the total number of cups in six equal stacks with no left over, the total number of cups will be divided by 6, if there is any remainder then the cups cannot be equally divided with no left over.

So

Dividing 64 by 6

= \frac{64}{6} \\= 10\frac{4}{6}

Here

Quotient = 10

Remainder = 4

As there are 4 cups left, Bob cannot distribute the cups in six equal stacks and not have any left over.

Keywords: Division, fractions

Learn more about division at:

  • brainly.com/question/4464845
  • brainly.com/question/4522984

#LearnwithBrainly

8 0
3 years ago
23=x-9;x+14 I need help with this problem.
frez [133]
 is  this answer 
x=1 ;) 
6 0
3 years ago
25
Cloud [144]
If you are asking if your work is good,thn yes,you are right

7 0
3 years ago
I just need the answer
kumpel [21]

Answer:

it's B ;)

Step-by-step explanation:

A line segment has two endpoints; that is, it has a starting point and an ending point, much like a dead-end street. Bisector means to divide, not just in two, but in halves, or two equal parts. Therefore, a segment bisector is a point, a line, a ray, or a line segment that bisects another line segment.

6 0
3 years ago
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