Find the mean and variance of the number of ink jet printer

Assignment Help Mathematics

Reference no: EM13191943

A computer store has 50 printers of which 30 are laser printers and 20 are ink jet printers. If a group of 10 printers is chosen at random from the store, find the mean and variance of the number of ink jet printers.

Reference no: EM13191943

Questions Cloud

How many trees are there in the world : How many trees are there in the world? The course I am doing is discrete mathematics.

Find the speed of each train : The speed of a passenger train is 18 mph fasster than the speed of a freight train. The passenger train travels 280 miles in the same time it takes the freight train to travel 190 miles. Find the speed of each train.

What will the final concentration of no be after equilibrium : the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.500 M. N2(g)+O2(g)2NO(g) If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after equilibrium is re-established?

Find the upper and lower darboux sums : Find the Upper and Lower Darboux Sums given F(x) = 5 - 3x on [0,2] and partition P = {tsub0 = 0, tsub1 = 2/n, tsub2 = 4/n, and tsub3 = 2}

Find the mean and variance of the number of ink jet printer : A computer store has 50 printers of which 30 are laser printers and 20 are ink jet printers. If a group of 10 printers is chosen at random from the store, find the mean and variance of the number of ink jet printers.

Define what are its molar mass and its molecular formula : An unknown gas sample with a mass of 3.17 g and a volume of 0.7521 L at 293.0 K under 1.023 atm has CH2Cl for its empirical formula. What are its molar mass and its molecular formula?

Why would the firm want to exit the industry : Suppose that demand is perfectly inelastic at 40 million bags, so that consumers demand 20 million bags no matter what the price is. What price should you charge if you want the firm to earn only a fair rate of return Assume as always that TC incl..

What is the area of the parallelogram : A parallelogram has adjacent sides of 176 ft and 312 ft. The altitude to the shorter side is 290 ft. What is the area of the parallelogram.

What percent of the available tickets was not sold : There were 400 tickets available for a school play. 368 tickets were sold. What percent of the available tickets was not sold?

User Account

All Pages