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sesenic [268]
3 years ago
6

Does anyone know this?

Mathematics
1 answer:
Step2247 [10]3 years ago
7 0

Answer:

I think the answer is A but I am not for sure

Step-by-step explanation:

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Suppose you know that Mr. and Mrs. Vincent have at most eight children. One day you happen to meet two girls who were the Vincen
lianna [129]

Answer:

The number of children are 4 out of which 3 are girls

Step-by-step explanation:

Data provided in the question:

P(Two randomly selected children are girls) = \frac{1}{2}

now,

let the number of children be 'n'

the number of girls be 'x'

thus,

P(Two randomly selected children are girls) = \frac{^xC_2}{^nC_2} = \frac{1}{2}

also,

^nC_r = \frac{n!r!}{(n-r)!}

thus,

\frac{\frac{x!2!}{(x-2)!}}{\frac{n!2!}{(n-2)!}} = \frac{1}{2}

or

\frac{x(x-1)}{n(n-1)}=\frac{1}{2}

or

2x(x-1) = n(n-1)

now

for x = 3 and n = 4

i.e

2(3)(3-1) = 4(4-1)

12 = 12

hence, the relation is justified

therefore,

The number of children are 4 out of which 3 are girls

3 0
3 years ago
5x + 4y = 20 on a graph
Yakvenalex [24]

Answer:

5x + 4y = 20 on a graph

Step-by-step explanation:

3 0
3 years ago
The printed price of a DVD player is $ 31. If the sales tax is 8% , find the price at which the DVD player is sold?
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$33.48

Step-by-step explanation:

6 0
3 years ago
What is a artafart and a Earth quack?
bekas [8.4K]
Aftershocks occur after the most major part of an earth quake happens. Earthquakes occur at fault lines near the tectonic border. They occur because of the sudden movement for staying rigid while they were edging closer and closer. So the sudden movement releases a large amount of tension buried deep below the earth creating or resulting in an earthquake.
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3 years ago
Jose received $30 for his birthday and put it in his piggy bank. Each week, he puts 4 more dollars in his bank. The amount of mo
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Step-by-step explanation:

8 0
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