Answer:
Total number of ways = 84
Step-by-step explanation:
Number of choices farmer has for cows = 2 out of 7
Number of choices farmer has for pigs = 3 out of 4
Number of choices farmer has for cows = 10 out of 10
[tex]\text{Number of ways of choosing cows = }_2^7\txterm{C}=21[/tex]
[tex]\text{Number of ways of choosing cows = }_3^4\txterm{C}=4[/tex]
[tex]\text{Number of ways of choosing cows = }_{10}^{10}\txterm{C}=1[/tex]
All these three groups of different animals can make different groups when taken together
Thus, Total number of ways = 21 × 4 × 1
⇒ Total number of ways = 84
