There is a stack of 8 cards, each given a different number from 1 to 8. suppose we select a card randomly from the stack, replace it, and then randomly select another card. what is the probability that the first card is an even number and the second card is greater than 6?
write your answer as a fraction in simplest form.

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.

Summary statistics given for independent simple random samples from two populations. use the pooled t-interval procedure to obtain specified confidence interval. x1=71.6, s1=3.9, n1=11, x2=67.9, s2=3.4, n2=9 determine a 99% confidence level.

Ineed some on this. not sure how to solve.