The number of people who reach the physical education standard in class 6 and 2 accounts for 7/8 of the whole class. The number of people who reach the standard and the number of the whole class are both between 40 and 50 people.
六2班体育达标人数占全班人数的(7/8)，达标人数和全班人数都在40～50人之间，全班有多少人．
<result>48</result>