Julie has a total of 155 DVDs, which include DVDs packed in different boxes and DVDs that are left over. This is acquired by adding the product of the number of DVDs per box the number of boxes for two different types of boxes, and the DVD left over.
In order to calculate the total number of DVDs Julie has, we would have to multiply the number of DVDs in each box by the number of boxes and add the DVDs that have not yet been packed.
To start, Julie packed 18 DVDs in each of the 4 boxes, which equals 18*4 = 72 DVDs.
Then, she packed 15 DVDs in each of the 5 boxes, which equals 15*5 = 75 DVDs.
Finally, she has 8 DVDs left over.
By adding all these up, we find out that Julie has a total of 72 + 75 + 8 = 155 DVDs.
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Find the probability that she develops lung cancer, given
she smokes.
To find the probability that she develops lung cancer given that she smokes, multiply the two probabilities together:
4/9 x 3/10 = (4 * 3) / (9*10) = 12/90 = 2/15
Hi, I think i got the answer wrong sorry!