statistics
posted by Jennifer .
The probability any one widget is free of defects is 0.93. For quality control purposes the company is concerned about bad batches of widgets. If the widgets are shipped in batches of 20, find the probability of at most 2 defective widgets in one batch.

Prob 0 defective = (.93)^20
prob 1 defective = C(20,1) (.93)^19 (.07)
prob 2 defective  C(20,2) (.93)^18 (.07)^2
prob (at most 2 defective) = 1  (sum of the above 3 probs)
Respond to this Question
Similar Questions

statistics
A company manufacturers batteries of 18 and there is a 3% rate of defects. Find the standard deviation for the number of defects per batch. Did you mean to write: "A company manufacturers batteries IN BATCHES of 18 and there is a 3% … 
Statistics
A company manufactures calculators in batches of 64 and there is a 4% rate of defects. Find the probability of getting exactly three defects in a batch. 
Intro to Probability
Widgets are produced at a certain factory by each of three machines A, B and C. These machines produce 1000, 600 and 400 widgets per day, respectively. The probability that a given widget is defective is 4% for one produced by Machine … 
Probability/Statistics
Please help!!! Smith Widget Company makes widgets for the medical industry. One particular customer requires widgets that meet FDA standards. One FDA standard requires Ztesting of at least 100 widgets at a time at the .08 level of … 
statistics
a company manufactures calculators in batches of 45 and claims that the rate of defects is 4%.find the probability of getting exactly 2 defects in a batch of of 45 if the rate of defects is 4%.if the store receives a batch of 45 calculators … 
algebra
the acme widget company has $13,000 available for making widgets. part of the money is spent on an advanced widgetbending machine costing $1,000. the manufacturing cost for each widget is $3. how many widgets can be made with the … 
economics
Suppose the price of widgets falls from $7 to $5 and consumption of widgets rises from 15 widgets a month to 25 widgets. Calculate your price elasticity of demand of widgets. What can you say about your price elasticity of demand of … 
Statistics
A company manufactures calculators in batches of 64, and there is a 5% defect rate. Find probability of getting at least three defects 
econmics
Suppose the price of widgets rises from $7 to $9 and consumption of widgets falls from 25 widgets a month to 15 widgets. Calculate your price elasticity of demand of widgets. What can you say about your price elasticity of demand of … 
Statistics
Before a DVD player leaves the factory, it is given a qualitycontrol check. The probability that a DVD player contains 0, 1, or 2 defectives are 0.90, 0.08, and 0.02, respectively. In a sample of 10 players, (a) Find the probability …