Answer:

Step-by-step explanation:
Given


Required
Determine the standard deviation (SD)
The standard deviation of a binomial distribution is calculated as thus:

Substitute values for n and p

Convert to decimals




--- <em>approximated</em>
<em>Hence, the calculated standard deviation is approximately 8.4932</em>
They would have used a total of 30 horses. Each person would've each ridden 15 so 15+15= 30 and 165 divided by 11 is 15. Hope this is off help!
Answer:
1/2
Step-by-step explanation: