Braden wants to compare the types of ducks in two nearby ponds. He collected two samples using the following criteria. For sample 1, he counted the types of ducks on Walden Pond from 6 A.M. to 9 A.M. For sample 2, he counted the number of Mallard ducks that were on Brook’s Pond from 12 P.M. to 3 P.M.
What would improve Braden’s plan? Select three options.
Braden should sample the ducks on each pond at the same time of day because animals are active at different times.
Braden should sample twice at each pond if he wants to make sure each sample is representative of the population.
Braden should count more than Mallard ducks on Brook’s Pond if he wants to compare the types of ducks on each pond.
Braden should only count Mallard ducks on Walden Pond so he counts the same types of ducks as he does at Brook’s pond.
Braden should include herons and geese in his samples because they also like ponds.
Answers
Answer:
probability that both cans were regular soda =
step-by-step explanation:
probability =
we are given 12 total number of cans; 4 cans have been accidentally filled with diet soda.
probability that first can is a regular soda:
outcome that first can is a regular soda will give us the number of regular soda available which are 4
using formula of probability
total possible outcomes are, n(total) = 12
desired outcome: 4 (cans of regular soda)
p(1st can) = =
probability that 2nd can is a regular soda:
as we have already taken a can of regular soda from the pack, the total soda in the pack now 11 and the regular soda left are 3.
total possible outcomes are, n(total) = 11
desired outcome: 3 (cans of regular soda as one has already been taken)
p(2nd can) =
probability that both cans are regular soda:
p(both) = p(1st can) × p(2nd can)
=
=
ansver
Answer from:
answer:
b
step-by-step explanation:
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