Answer:
5
Step-by-step explanation:
First lets identify the number of treatments possible.
1st possibility: no fertilizer, no mulch
2nd possibility: no fertilizer, wood chips
3rd possibility: no fertilizer, pine needles
4th possibility: no fertilizer, plastic
5th possibility: 1 cup fertilizer, no mulch
6th possibility: 1 cup fertilizer, wood chips
7th possibility: 1 cup fertilizer, pine chips
8th possibility: 1 cup fertilizer, plastic
9th possibility: 2 cup fertilizer, no mulch
10th possibility: 2 cup fertilizer, wood chips
11th possibility: 2 cup fertilizer, pine chips
12th possibility: 2 cup fertilizer, plastic
Or we can simply calculate no. of possibilities by elements in set a x elements in set b
Total no. of possibilities = 3 x 4 = 12
To find no. of plants for each treatment divide total number of plants by the total treatments possible.
No. of plants for each treatment = total number of plants/ total number of treatments possible
No. Of plants for each treatment = 60/12
No. of plants for each treatment = 5
