It Depends On What You are Making for Example If You Want To Make A Cupcake You Going To Measure And See How Many Cups Of Water and All The Things They Need To Make The Cupcake You Probably Need 3 Cups. You Should Be More Specific With Your Question.
average, petite, and tall
50 people are surveyed about favorite preference
450 pairs ordered
average = 25/50, which is half
25/50 = ?/450
so ?/450 = 1/2
450 / 2 = 225, so 225 pairs should be average length.
hoped this helped!
Answer: N(20, 4) distribution.
Step-by-step explanation:
Normal approximation to Binomial :
The normal approximation is used for binomial distribution having parameters n and p as

if x is the random variable then x has
.
Given : As part of a promotion for a new type of cracker, free trial samples are offered to shoppers in a local supermarket.
The probability that a shopper will buy a packet of crackers after tasting the free sample : p=0.20.
Different shoppers can be regarded as independent trials.
if X is the number among the next 100 shoppers who buy a packet of crackers after tasting a free sample.
Then, Mean and standard deviation for x will be :

i.e. X has approximately an N(20, 4) distribution.