A coin is rolled three times.find the probability of getting 2 heads
2 answers:
There are 8 possible outcomes when you throw a coin three times:
Out of these combination, the ones with exactly two heads are
So, 3 combinations out of 8 have exactly two heads. This means that the probability of having two heads with three coin throws is 3/8
Answer:
<u>Step-by-step explanation:</u>
Step 1: Numerator
You are looking for an outcome of getting exactly two heads out of a total of three tosses. This can be written as: ₃C₂
The formula for a combination problem is:
- n is the total number of tosses
- r is the total number of successes (in this case, heads)
There are 3 successes (heads)
Step 2: Denominator
You are looking for the total possible combinations of heads and tails for three tosses (2³)
1st toss and 2nd toss and 3rd toss
2 x 2 x 2 = 8 total possible outcomes
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Answer: 7°
Explanation:
FBD = EBC
2x + 3 = 9x - 11
-7x = -14
x = -14/-7
x = 2
EBC = 9(2) - 11 = 18 - 11 = 7°
Answer:
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Step-by-step explanation: