Answer:
1/2
Step-by-step explanation:
since there are an equal number of boys and girls in the class, there is a 50% chance there will be all girls or all boys
The answer should be 10 but it is not in the choices
F(-2)=8-10*(-2)=28
g(-2)=5(-2)+4=-6
fg(-2)=168
Question: "A coin is tossed 8 times. Find the probability P(of exactly 6 occurrences of tails)"
Answer:
When we toss a coin we have 50% of probability to get a tail and 50% probability to get heads.
If we toss the coin 8 times, in order to find P(T=6), we need to use the binomial distribution:
where:
n = total number of events
k = number of successes we want
p = probability of success
Therefore:
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= 28 · 0.015625 · 0.25
= 0.109375
Hence, the probability of getting 6 tails out of 8 tosses is D) 10.94%.
Val (huh, I didn't know that was an actual name) scored around 742 points, 30% fewer than Peeta. Since, 30% of 1060 can be found by multiplying 30% as a decimal (0.30), which means that 30% of 1060 is 318. However, it doesn't say that Val scored 30% of the points Peeta scored. No, it says that Val scored 30% LESS than the score Peeta scored. So, we're subtracting.
1060 - 318 = 742
So, Val scored 742 points.