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Goshia [24]
3 years ago
14

the students in high school enter school between 9:45am to 10am. the timing of the 400 students entering the school are normally

distributed. with a mean of 9:55 and a standard deviation of 1 minute. how many students enter before 9:55am​
Mathematics
1 answer:
bonufazy [111]3 years ago
4 0

Answer:64 students

Step-by-step explanation:

using the empirical rule, we know that 34% of a normal distribunion is below the mean but above 1 standard deviation. This means that 16% of the students enter before 9:55. Take 16% of 400 and you get the amount of students in before 9:55

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Answer:

The number of boys are 18 and the number of girls are 30.

Step-by-step explanation:

The ratio of number of girls to the boys = 3 : 5

Let the number of girls is g and boys is b initially.

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Now, girls are 6 + g and boys are b - 9

So, the ratio is

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From ( 1 ) and ( 2 )

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7 0
3 years ago
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Step-by-step explanation:


8 0
3 years ago
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Use trigonometric ratios.
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