Answer:
I THINK its 11
Step-by-step explanation:
Mean is just average and if you add the cars sold in the first 3 months it equals 29. we need an average of 10. 40 divided by 4 is 10. we divide by for because it is the number of months. to get to 40 overall cars, he would need to sell 11 cars in the 4th month.
