bca

+Cab

——————

777

abc=42 1

13 has no shading, so I'm sorry I can't do it.

14.90×4=360 (minimum)

360+ 100=460 (points)

460÷5=92 (points)-full marks.

360+200=560 (point)

560÷6≈93 (points)-two full marks

360+300=660 (minutes)

660÷7≈94 (points)-three full marks

360+400=760 (minutes)

760÷8=95 (points)-four full marks.

Therefore, he must take at least four full sail tests in a row to achieve an average score of more than 95 points.

15. Group 1: 9 1 85 33, with a total of 209.

Group 2: 77 5 1 65, total 193.

209— 193= 16

1. There must be at least 14 seats.

15-2 = 13

13×2— 13= 13

13+ 1= 14 seats

2. 1800÷ 12×7—490

= 150×7—490

= 1050—490

=560 (yuan)

That washing machine, 560 yuan.