= 2/5+65438/5+0+2/3

= 5 choose 3+3 choose 2

= 65438+9/05+ 15/ 10

= 15 points 19

(2) (65438 in 3+0-65438 in 6+0) 65438 in 5+0 in 6+0.

= (65438 in 3+0-65438 in 6+0) × 5+65438 in 6+0

= 5/3-5/6+ 1/6

= 5/3-4/6

= 5/3-2/3

=0

(3) 1 1.3× 8.5+4.3× 1 1.3.

= 165438+3× 0 (5/8+3/4)

= 1 1 3×8 1 1

= 3 out of 8