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#13254

data analysis

probability

hard

25 sec

In a large nature reserve with an estimated population of 15,600 animals, a conservationist randomly observes an animal. The probability that the observed animal is a type of migratory bird is 0.487. If there are $b$ migratory birds in the reserve, what is the value of $b$ to the nearest integer?

• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-).
• Fractions must be in lowest terms.
• Mixed numbers must be converted to improper fractions.