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pentagon [3]
3 years ago
11

There are three identical desks, each with two drawers. In one desk, both drawers contain gold coins. In another desk, both draw

ers contain silver coins. In the third desk, one drawer holds a silver coin and the other drawer holds a gold coin. You choose a desk at random, and open one of the drawers at random. If you see a gold coin, what is the probability that the other drawer in that desk also contains a gold coin?
Mathematics
1 answer:
djverab [1.8K]3 years ago
5 0

Answer:

P ( B / A ) = 1/3

Step-by-step explanation:

Solution:-

You select a drawer and select a coin from that drawer.

Let A denote the event that the coin that you select is silver.

Let B denote the event that the other coin in the drawer is gold.

You are equally likely to pick any coin, so:

                 P ( A ) = 3 silver coins / 6 coins in total = 0.5

There are 6 different ways you could have selected a coin. Only one of them results in you selecting a silver coin AND the other coin in the drawer being gold, so:

                 P ( A & B ) = 1 desired / 6 total coins = 1/6

By the definition of conditional probability:

                P ( B / A ) = P ( A & B ) / P ( A )

                                 = 1/6 / 0.5

                                 = 1 /3

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School sold 2 adult tickets and 10 child tickets for a total of $56. The school took in $52 on the second
pochemuha

Answer:

x+y=4+8=12

$12 for one of each

or if you mean indivually (the wording confused me)

$4 for child, $8 for adult

Step-by-step explanation:

x=adult

y=child

2x+10y=56

4x+5y=52

iin order to be able to subtract values and find x and y im going to multiply 4x+5y=52 by two and get 8x+10y=104

8x+10y=104

-2x+10y=56

6x=48 divide each side by 6

x=8

plug 8 back into an equation to find cost of y

2(8)+10y=56

-16            -16

10y=40

y=4

6 0
3 years ago
Sain has a student loan for $22,990. This loan has a simple interest rate of 5%. What is the amount of interest Sain will be cha
djyliett [7]

Answer:

3448.5

Step-by-step explanation:

I=PRT

I=22990×0.05×3

=$3448.5

4 0
3 years ago
Read 2 more answers
(PLEASE ANSWER ASAP) Which number is between 1/6 and 0.25?
serg [7]

If you change both to a fraction you would see that you have 1/6 and 1/4 (.25 as a fraction). So 1/5 would be in between them.

You could also change both as a decimal. 1/6 =.166666 and .25 so any number in between them would be correct such as .2 which is the same as 1/5.

8 0
3 years ago
PLEASE HELP MATH
Novosadov [1.4K]
I believe C is your answer. 
I hope this helps!
7 0
3 years ago
Read 2 more answers
PLEASEEE HELLPPP!!!!!!!!
belka [17]

Answer:

4.25 i think

Step-by-step explanation:

sorry i    have not done these in a while it might be wrong

5 0
3 years ago
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