1. The mean of 82 numbers is 38. If each number is multiplied by 4, find the new mean.
2. One card is drawn from a pack of 52 cards. Find the probability that the card drawn is black and a queen.
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1) 1.853 is the answer of 1st question according to me
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Answer:
1. 152.
2. ~2% chance.
Step-by-step explanation:
1. The mean being 38 means that 38 is the middle number. In order to see what the mean would be if all of the numbers were multiplied by 4, just multiply the mean by 4.
2. There are 26 black cards in the average deck of cards. In those 26 cards, there are 2 queens. There is a 1/2 chance that the card will be black and a 1/26 chance that it will be a queen. 1/2*1/26=1.923076925% or ~2% chance.
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