Answer:
Step-by-step explanation:
640
Answer: a) 0.5636 b) 0.7881
Step-by-step explanation:
We assume that women’s heights are normally distributed .
Let x be the random variable that represents the shoe sizes.
Also, The population mean = ; Standard deviation:
a) Formula for z:-
Put x= 64, we get
Now, the probability that the male shoe sizes are greater than 8 :-
Hence, the probability that her height is less than 64 inches = 0.5636
b. Sample size : n= 25
Then , the formula for z :-
Put x= 64, we get
Then, the probability that they have a mean height less than 64 inches.:_
Hence, the probability that they have a mean height less than 64 inches. =0.7881
B.find the experimental probility of not landing on 6
Answer: You are funny :)
Step-by-step explanation: Visualise Average as concept of “give & take”.
Average of first 8 number = 21
Average of last 4 number = 18
If average of all 12 numbers is 18, then we have 8 x 3 = 24 extra from first eight numbers.
This extra is distributed over all 12 numbers increasing their average by 24/12 = 2.
=> Final average = 18 + 2 = 20
No equations no fuss.
Note : This method is for Aptitude Test takers and not for school homework.
:-)
Answer:
n =-19
Step-by-step explanation:
3* (n+7) = -36
Distribute
3n+21 = -36
Subtract 21 from each side
3n+21-21 = -36-21
3n = -57
Divide by 3
3n/3 = -57/3
n =-19