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Brilliant_brown [7]
3 years ago
6

The ages of the 32 recruits in police academy are normally distributed with a mean of 27 with a standard deviation of 2. What pe

rcent of the recruits are between ages 23 and 27?
Mathematics
1 answer:
Natalka [10]3 years ago
8 0
Z scores are   (age - mean) / std dev

= 23 - 27 / 2  = -2  and  27-27 / 2  = 0 

Using the standard normal tables we find the required percentage is 47.73%

                
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<u>Answer:</u>

Bill has bags of candy with five pieces in each. The Bill has 16 bags

<u>Solution:</u>

Given, Dan has bags of candy with two pieces in each.  

Bill has bags of candy with five pieces in each.  

Bill has six more bags than Dan.  

Then, number of bags with bill = 6 + number of bags with dan.

The total number of pieces candy the two boys have 100.  

Now, candies with bill + candies with dan = 100

⇒ 5 pieces per bag x number of bags with bill + 2 pieces per bag x number of bags with dan = 100

⇒ 5 x (6 + number of bags with dan) + 2 x number of bags with dan = 100

⇒ 30 + 5 x number of bags with dan + 2 x number of bags with dan = 100

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⇒ 7 x number of bags with dan = 70

⇒ Number of bags with dan = 10

So, number of bags with bill = 6 + 10 = 16

Hence, bill has 16 bags.

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