In a certain algebra 2 class of 30 students, 7 of them play basketball and 11 of them play baseball. there are 5 students who play both sports. what is the probability that a student chosen randomly from the class plays basketball or baseball?

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?