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kap26 [50]
3 years ago
14

The ratio of the number of boys to the number of girls is 8:7. The total class is 195 how many boys are there. How many girls ar

e there
Mathematics
1 answer:
swat323 years ago
4 0
8x+7x=195\\
15x=195\\
x=13\\\\
8x=8\cdot13=104 \leftarrow \hbox{boys}\\
7x=7\cdot13=91\leftarrow \hbox{girls}
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Flora has 33 flowers and she can pick 7 flowers a minute. Write an equation that shows how many flowers, F, that Flora will have
monitta
F=7M
33=M
Both answers will work
3 0
3 years ago
The probability of event a is x, and the probability of event b is y. if the two events are independent, which condition must be
nalin [4]

Condition (A) P(B/A) = y is true.

<h3>What is probability?</h3>
  • Probability is an area of mathematics that deals with numerical descriptions of how probable an event is to occur or how likely a statement is to be true.

To find the true condition:


If two events are independent, then:

  • Pr(A∩B) = Pr(A) . Pr(B)

Use formulas for conditional probabilities:

  • Pr(A/B) = Pr(A∩B) / Pr(B)
  • Pr(B/A) = Pr(B∩A) / Pr(A)

For independent events these formulas will be:

  • Pr(A/B) = Pr(A∩B) / Pr(B) = Pr(A) . Pr(B) / Pr(B) = Pr(A)
  • Pr(B/A) = Pr(B∩A) / Pr(A) = Pr(B) . Pr(A) / Pr(A) = Pr(B)

Now in your case, Pr(A) = x and Pr(B) = y.

  • Pr(A/B) = x, Pr(B/A) = y, Pr(A∩B) = x.y

Therefore, condition (A) P(B/A) = y is true.

Know more about probability here:

brainly.com/question/25870256

#SPJ4

The complete question is given below:

The probability of event A is x, and the probability of event B is y. If the two events are independent, which of these conditions must be true?

a. P(B|A) = y

b. P(A|B) = y

c. P(B|A) = x

d. P(A and B) = x + y

e. P(A and B) = x/y

5 0
1 year ago
How many 2 1/2 hour movie can be shown consecutively in a 20 hour period?
Cloud [144]
20/2.5 = 8
So 8 movies can be shown in 20 hours.
5 0
3 years ago
Read 2 more answers
Please come answer this, I need help asap
Vadim26 [7]

Answer:

26

Step-by-step explanation:

To evaluate this expression, all we have to do is substitute the given values of the variables into the expression. That is, replace every m in the expression with a 1 and every p in the expression with a 5.

Doing so, we get:

p^{2} +m

=5^{2} +1 (Substitute given values into the expression)

=25+1 (Evaluate exponential term)

=\bf26 (Add)

Hope this helps!

8 0
3 years ago
jake scored 2 goals in soccer this season. jamie scored 4 times as many goals as jake. Edgar scored 3 times as many goals as jam
JulsSmile [24]

Answer:

24

Step-by-step explanation:

2x4 = 8 8x3 = 24 so edgar has 24 goals

3 0
3 years ago
Read 2 more answers
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