A meteorologist said it rained during 30% of the past 70 days. How many days did it rain?
1 answer:
You might be interested in
ANSWER
45 green bands
EXPLANATION
The ratio of red hair bands to green hair bands is
5 : 9
The total ratio is:
If there are a total of 70 hair bands,
Then the number of green bands
Simplify
Multiply
Therefore, there are 45 green bands.
93.06% of the race is longer than 236 minutes.
The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:
Given that μ = 310, σ = 50
For x > 236:
From the normal distribution table:
P(x > 236) = P(z > -1.48) = 1 - P(z < -1.48) = 1 - 0.0694 = 0.9306 = 93.06%
93.06% of the race is longer than 236 minutes.
Find out more on z score at: brainly.com/question/25638875