The number of people who have reached the standard in class 6 and 3 accounts for all (6/7). The number of people who reach the standard and the number of people in the class are both between 40-50.
六3班体育达到标准的人数占全体的(6/7)，达标人数和全班人数都在40-50之间，全班有多少人．
<result>49</result>