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3 years ago

Leah flips three fair coins. What is the probability that she will land on 2 heads and 1 tail?

Mathematics

2 answers:

Sergeeva-Olga [200]3 years ago

8 0

Answer:

b. 3/8

Step-by-step explanation:

There are 8 total outcomes on what the coin will land on. If you look at the image, you'll see that there are 3 outcomes for the coin landing on 2 heads and 1 tail.

HHT

HTH

THH

ozzi3 years ago

8 0

Answer:

$\frac{3}{8}$

Step-by-step explanation:

There are a total of 8 outcomes.

Out of the 8 outcomes, 3 outcomes are 2 heads and 1 tail.

HHT, HTH, THH

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It took John 12 hours riding his bike to make the round trip to his uncle's. If he averaged 20 mph out and 30 mph back, how long

notsponge [240]

Answer:

Step-by-step explanation:

Let the time taken by the john to get to his uncle be x.

Let the time taken by the john to get back from his uncle be y.

So,

x+y=12 ------ equation 1

According to the given velocities:

20x=30y

x=3/2y

Put the value x=3/2y in equation 1

3/2y+y =12

3y+2y/2=12

3y+2y=12*2

5y=24

y=24/5

y=4.8h

Now put the value of y in x=3/2y

x=3/2*4.8

x=14.4/2

x=7.2h ....

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2 years ago

The difference of any two negative integers is a negative integer

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Answer: look at the bottom

Step-by-step explanation:

Difference of two negative numbers may or may not be negative. It depends on the numbers taken as well as on the sequence in which they are taken. Then, a-b=b-a=0, (which is neither negative nor positive..!!!) So difference of two negative numbers may be positive, negative or even zero.

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3 years ago

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68% of the tickets sold at a water park were child tickets. If the park sold 50 tickets in all, how many child tickets did it se

Mnenie [13.5K]

Answer:

$\boxed{\bf\: The \: park \: sold \boxed{ 34{}} \: child \: tickets.}$