(7−26+1639)=?
(a) 1178
(b) −1178
(c) 1139
(d) −1139
7−26+1639=−21+3278=1178
A team of 8 couples attend a lucky draw in which 4 persons are picked for a prize. Then the probability that there is at least one couple is
A. 11/39 B. 12/39 C.14/39 D. 15/39