An urn has 5 red, 10 green and 15 yellow marbles. a simple random sample of 5 marbles is taken from this urn. let x denote the number of yellow marbles in the sample. (a) what is the expectation and the standard deviation of x? (b) what is the probability to have exactly 2 yellow marbles in the sample?

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

Create a graph for the demand for starfish using the following data table: quantity/price of starfish quantity (x axis) of starfish in dozens price (y axis) of starfish per dozen 0 8 2 6 3 5 5 2 7 1 9 0 is the relationship between the price of starfish and the quantity demanded inverse or direct? why? how many dozens of starfish are demanded at a price of five? calculate the slope of the line between the prices of 6 (quantity of 2) and 1 (quantity of 7) per dozen. describe the line when there is a direct relationship between price and quantity.

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?