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belka [17]
3 years ago
8

Three coins are tossed. What is the probability that two land on heads?

Mathematics
1 answer:
mart [117]3 years ago
7 0
<span>Before you begin, you need to assume some things about the coins for this problem to be solvable.  These assumptions are natural, but they are ESSENTIAL as well, so you shouldn't make them without realizing it.

#1) You have to assume the outcomes on each coin flip are independent.  (Our understanding of the physics of coin flipping easily justifies this assumption.)  the answer is 1/2

#2) You must assume something about the probability of heads on each of the three coins.  The usual assumption is that there is a 50% chance of heads on each toss of each coin.
</span>
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Barb solved the following equation: 4(3x – 12) = 5(2x + 6)
katrin2010 [14]

Answer:

4(3 * 39 – 12) = 5(2 * 39 + 6)

x = 39


Step-by-step explanation:

4(3x – 12) = 5(2x + 6)

(12x - 48) = (10x + 30)

12x - 10x = 30 + 48

2x = 78

2x/2 = x

78/2 = 39

x = 39

No Prob :)

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3 years ago
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its easy g

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What is the answer srry I need help and no one knows
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6 0
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Please explain to me how to find the solution of 3n+8=20 Thank you
allsm [11]
First, you subtract 8 by both sides ( 8-8/ 20-8) so now your equation is 3n=12. Next, you multiply 3n by 3, and get 0, and 12 multiplied by 3 and the answer is 36! Hope this helped. 
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