90× 0.3+95× 0.4+100× 0.3 = 95 points.

2、

[(600+1200)/1000] ÷1.4+0.85) = 0.8 minutes.

3. This 12 year is:

Chickens, dogs, pigs, rats, cows, tigers, rabbits, dragons, snakes, horses, sheep and monkeys.

2050 ÷ 12 = 170 ... on 10

So 2050 is equivalent to 10, which is the year of the horse.