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Yuri [45]
3 years ago
13

A jar contains 30 marbles. It has 10 red, 8 black and 12 green marbles. Two marbles are drawn, the first is not returned before

the second one is drawn. What is the probability that both marbles are green?
P(Both Green) =
4 / 5


P(Both Green) =
11 / 75


P(Both Green) =
28 / 325


P(Both Green) =
22 / 145
Mathematics
1 answer:
saul85 [17]3 years ago
7 0

Answer:

P(Both Green) =  22/145

Step-by-step explanation:

The probability of drawing green on the first drawn is P(First Green) = 12/30 = 2/5.

Having drawn green in the first drawn, the probability of drawning green in the second drawn is P(Second Green) = 11/29.

Then, the probability that both marbles are green is obtained by multiplying both probabilities as follows: P(Both Green) = (2*11)/(5*29) = 22/145

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The sum of 3 and 7 times a number is 45
san4es73 [151]

Answer:

4.5

Step-by-step explanation:

The sum of 3 and 7 is 10

then what number to you multiply 10 by to get 45

45 ÷ 10 = 4.5

so the answer is 4.5

6 0
3 years ago
I need help with 5 1\2× 3 1\4 =?
sattari [20]

5 1/2 * 3 1/4


1 + 5 . 2/2 * 1 + 3 . 4/4 = 11/2 * 13/4 = 11 . 13/2 . 4 = 143/8 = 7 + 17 . 8/8 = 17 7/8


= 17 . 875



Detailed explanation of solution:


5 1/2 * 3 1/4


Transform the first mix number to improper fraction:


5 1/2 = 1 + 5 . 2/2 = 11/2




Transform the second mix number to improper fraction:


3 1/4 = 1 + 3. 4/4 = 13/4




Multiplying two fractions:


11/2 * 13/4 = 11 . 13/2 . 4 = 143/8




Since the numerator is greater than the denominator, We convert the improper fraction to mix fraction:


143/8 = 7 + 17.8/8


= 17 7/8 (Decimal: 17. 875)








Hope that helps!!!!!! ( Answer: 17 7/8, (Decimal: 17.875)




3 0
3 years ago
) Lucy, Soling, Kyan, and Daniel are ordering dinner for their families. Each person spends
melisa1 [442]

Answer:

Lucy is 5(m+3)=65

Soling is 5m-3=65

Kyan is 5m+3=65

Daniel is 5(m-3)=65

Step-by-step explanation:

3 0
3 years ago
HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
mariarad [96]

Answer:

What would you like help with?

Step-by-step explanation:

6 0
3 years ago
WORTH: 10 POINTS
Musya8 [376]
D) 9 because 1.45 divided by 5 = 0.29

if you move to the hundredths place (9) and its not 2 because, 2 is in the tenths
6 0
3 years ago
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