A group consists of 150 children. The group is divided into three subgroups A,B and C in the ratio of 2 :5:3 respectively. The average age of the children in the subgroup A is 8 years. The average age of the children in the subgroup B is 10 years. The average age of the children in the subgroup C is 12 years. What is the average age of all the 150 children in the group?

How many different ways are there to select a group of 4 out of 8 people for a survey?

#6) You use 2,500 incandescent holiday lights to decorate your apartment in Huntington. When turned on, the combined power of those lights is 1200 Watts. The electricity cost around is 6.40 cents per kilo- Watt-hour. How much is the total cost of electricity for the lights if you operate the 2,500 incandescent holiday lights for 24 hours per days for 50 days? Report your answer with the proper number of sig figs and rounding. Show all conversions. Express answer to 3 sig figs. Report answer in dollars.

The 2017 Chapman University Survey of American Fears asked a random sample of 1207 American adults if they believed that aliens had come to Earth in modern times, and 26% responded yes. Complete parts (a) through (d) below.

There are twelve sheep in the field.Eduardo noticed that there are more goats in the field than there are sheep.Which of the following is a possible ratio of sheep to goats?A. 12/5 B. 12/12 C. 17/12 D.12/17