Two owners of a cattle ranch, Robert and Val, want to find the average weight for the ranch's 200 cows. Instead of weighing all of the cows:

• Robert weighs 25 cows and gets an average weight of 1,550 pounds (stdev = 50)
• Val weighs 100 cows and gets an average weight of 1,380 pounds (stdev = 50)

What is Val's margin of error, rounded to the nearest whole number? (The formula is 1.96 (std dev) / N" style="box-sizing: border-box; border: 0px; max-width: 100%; height: auto; display: inline; vertical-align: middle; line-height: inherit; max-height: 31.25rem;">

3.92

9.80

2.45

1.01