10 A company made a number of purchases during the course of a year's trading. The amounts were as follows: Purchases ({) January April | July October Stationery 153 256 185 380 Computer supplies |305 475 515 498 Comestibles 121 85 325 79 Hardware 1070 895 407 983 One purchase is sampled at random by the company. What is the probability that it was for less than $400? a. 0.49 b. 0.75 C. 0.56 d. 0.51