A bowl of flower seeds contains 5 petunia seeds and 15 begonia seeds. Riley calculated the probability that a random selected seed is a petunia seed as 1/3. Describe and correct Riley's error.

Riley divided the number of petunia seeds by the number of begonia seeds, getting . What you actually need to do to calculate the probability of selecting a petunia seed is divide the number of petunia seeds by the total number of seeds. 5 petunia seeds and 15 begonia seeds makes 20 total seeds, so you divide 5 petunia seeds by 20 total seeds to get .

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies