A salesman wants to know the average number of units he sells per sales call. He checks his past sales records and comes up with the following probabilities:: Sales (in units): 0 1 2 3 4 5 Probability 0.15 0.20 0.10 0.05 0.30 0.20 . What is the average number of units he sells per sale call?

A dealer in refrigerators estimates from his past experience the probabilities of his selling refrigerators in a day. These are as follows: No of refrigerators sold in a day: 0 1 2 3 4 5 6 Probability 0.03 0.20 0.23 0.25 0.12 0.10 0.07 Find the mean number of refrigerators sold in a day.

A man has a number of oranges.If he sells them at Rs.1.25 per 20 oranges,he loses rs.2.50 .if he sells them at Rs.1.50 per 20 oranges,he gains rs.5. What is the number of oranges?

A random variable X has the following probability distribution : {:(X:,1,2,3,4,5,6,7,8),(P(X):,0.15,0.23,0.12,0.10,0.20,0.08,0.07,0.08):} for the events E=[X is a prime number] F={X lt 4}, the probability P(EUF) is a)0.87 b)0.77 c)0.35 d)0.5

The probability that a person will hit a target in shooting practices is 0.3 . If he shoots 10 times , then the probability of his shooting the target is :

A salesperson recorded her sales during a particular 5-day work week, shown in the table above, in order to study her daily sales. The salesperson wants to increase her averages sales per day by 20% in the following week. Given the information in the chart above, what should her daily sales average be for the following week?

A fruit seller buys some oranges at the rate of 4 for Rs 10 and an equal number more at 5 for 10. He sells the whole lot at 9 for Rs 20. What is his loss or gain per cent ?

The price elasticity of supply of a commodinty is 2.0 A firm supplies 200 units of it at a per price₹8 per unit.At what price will it supply 250 units?