Question

at survived to adulthood. Use this table to answer the questions below. Chicks Chicks that reached Adulthood Starling 100 15 Cardinal 15 3 Pigeon 325 45 Blackbird 415 50 Crow 230 30 What is the probability that a Starling chick will reach adulthood? If you randomly pick a blackbird or crow chick, what is the probability it will reach adulthood? Which species has chicks with the greatest chance of reaching adulthood? Which species has chicks with the least chance of reaching adulthood?The table below lists chicks that were born to different species of birds. The second column gives the number of those chicks that survived to adulthood. Use this table to answer the questions below.
Chicks Chicks that reached Adulthood
Starling 100 15
Cardinal 15 3
Pigeon 325 45
Blackbird 415 50
Crow 230 30
What is the probability that a Starling chick will reach adulthood?

If you randomly pick a blackbird or crow chick, what is the probability it will reach adulthood?

Which species has chicks with the greatest chance of reaching adulthood?

Which species has chicks with the least chance of reaching adulthood?

Answer 1

What is the probability that a Starling chick will reach adulthood?

15 out of 100 Starlings reached adulthood so there is a 15/100 probability.

15/100 reduces to 3/20 as a fraction ( 0.15 as a decimal)

If you randomly pick a blackbird or crow chick, what is the probability it will reach adulthood?

Total number of blackbirds and crows = 415 + 230 = 645

Total that reach adulthood = 50 +30 = 80

Probability of reaching adulthood = 80/645, reduces to 16/129 as a fraction

( 0.124 as a decimal)

Which species has chicks with the greatest chance of reaching adulthood?

Starlings = 15/100 = 0.15

Cardinals = 3/15 = 0.2

Pigeons = 45 /325 = 0.138

Blackbirds = 50/415 = 0.12

Crows = 30/230 = 0.13

Cardinals have the highest chance.

Which species has chicks with the least chance of reaching adulthood?

Blackbirds have the lowest chance.