A pack of 40 card (ace , 2 ,3 ,4 ,…..10) divided into 4 colors. What is the number of Minimum attempts of choosing cards to give us at least 3 cards with the same numbers?

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.

Which of the following are accepted without proof in a logical system? check all that apply.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.