Someone me find this, the answer is not d.

How many grams must be adde to 970g to make 1 and a half kg

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)