Need to be done plz

question 7 the pie chart shows information about the grades achieved by all of the
candidates in keval's school who took as level english in 2015.
126
8 candidates achieved grade c.
work out the number of candidates in keval's school who took as level english in 2015.
candidates

40

Step-by-step explanation:

8 - 72

x - 360

a) Z for northern region = 1 , Z for southern region = -1.2

b) Southern region

Step-by-step explanation:

a) Z = (x – mean)/standard deviation

Le x be weight for birds

For the northern region  

Z = (13 – 10)/3

Z = 1

For the southern region

Z = (13 – 16)/2.5

Z = -1.2

b) to find in what region is more likely to find a bird with 13 ounces, we calculate the probability for each z value

For the northern region  

P (x>13) = P(z > 1)

Then we use the z table to find the area under the curve.

P (x>13) = 0.1587

For the southern region

P (x>13) = P(z > 1.2)

Then we use the z table to find the area under the curve.

P (x>13) = 0.8849

Is it more likely that a bird with a weight greater than 13 ounces lives in the southern region