1. There are 270 people in the three engineering teams of Party A, Party B and Party C. due to the need of work, 15 people are drawn from each team of Party A and Party B to team C. at this time: A: B: C = 1:3:2, how many people are there in team B? 2. The number of trees planted by a, B and C is one half of that of B, C and C. the number of trees planted by B is one third of that of a, C and C. It is known that 130 trees have been planted by C. how many trees have been planted by a? 4. During the promotion period, the price of a piece of clothing will decrease (1 / 11). If the activity ends and the original price is restored, how much will the price increase? 5. A batch of parts are packed in boxes. When they are packed in 10 boxes, only 16 / 25 of them are packed. The remaining parts are only enough for 5 boxes and 20 more. How many parts are there in this batch?

1. There are 270 people in the three engineering teams of Party A, Party B and Party C. due to the need of work, 15 people are drawn from each team of Party A and Party B to team C. at this time: A: B: C = 1:3:2, how many people are there in team B? 2. The number of trees planted by a, B and C is one half of that of B, C and C. the number of trees planted by B is one third of that of a, C and C. It is known that 130 trees have been planted by C. how many trees have been planted by a? 4. During the promotion period, the price of a piece of clothing will decrease (1 / 11). If the activity ends and the original price is restored, how much will the price increase? 5. A batch of parts are packed in boxes. When they are packed in 10 boxes, only 16 / 25 of them are packed. The remaining parts are only enough for 5 boxes and 20 more. How many parts are there in this batch?

1.1 + 3 + 2 = 6. After Party A and Party B each transfer 15 people to team C, team C has 270 × 2 / 6 = 90 people and team B has 270 × 3 / 6 = 135 people
Team B: 135 + 15 = 150
2. Type a accounts for 1 / 3 of the total number
The second kind of total: 1 △ 1 + 3 = 1 / 4
Three people planted: 260 (1-1 / 3-1 / 4) = 624 (trees)
A total of 624 × 1 / 3 = 208 (trees)
The total number of trees planted in B is 624 × 1 / 4 = 156
3. If the original price is set as unit 1, then the current price (1-1 / 11 = 10 / 11) is 1 / 10 / 11 = 11 / 10
4. A total of 500
If x pieces are packed in each box, the total number of parts is 10x + 5x + 20
When we packed ten cases according to the title, we just packed 16 / 25 of the parts,
That is: 10x / (10x + 5x + 20) = 16 / 25 to x = 32
So parts = 10 * 32 + 5 * 32 + 20 = 500