Answer:
20 percent
Step-by-step explanation:
Total number of pieces in a puzzle = 500
No. of pieces in first container = 220
No. of pieces in second container = 180
Let no. of pieces in the third container be x.
We get,
On adding 220 and 180, we get
On transposing 400 to RHS, we get
Percentage of pieces in the third container = (no. of pieces in third container/total no. of pieces in a puzzle)
Therefore, percentage of pieces in the third container = 20 percent
The total number of ways can first, second and third place can be assigned are:
6840
<h2>Step-by-step explanation:</h2>The total number of people that compete are: 20
Out of these 20 people we have to chose 3 people and also arrange them according to their ranks.
We know that when we have to choose and arrange r items out of total n items then we need to use the method of permutation.
Hence, the formula is given by:
Here we have:
n=20 and r=3
Hence, the number of ways first, second and third place can be assigned are:
Hence, the answer is:
6840
