Last year's annual profit (corrected to the nearest million dollars) of a random sample of small and medium size companies of industrial sector A is given below:

Annual Profit ($ million) Number of companies

• -4-0 5
• 1-4 24
• 5-9 38
• 10-19 23
• 20-39 7
• 40-59 3

(b) Estimate, from the frequency distribution table, the proportion of companies having last

(c) It is known that a randomly selected small and median size company had annual profit for last year larger than $7.5 million. Estimate, from the frequency distribution table, the probability that this company had annual profit not more than $25 million.