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#30881

statistics

data analysis

inequalities

hard

100 sec

A wildlife researcher tagged 400 migratory birds. In the first month, 150 of these tagged birds were sighted. In the second month, $x$ of the remaining tagged birds were sighted. If the total percentage of tagged birds sighted over both months was exactly 60%, and no bird was sighted in both months, what was the value of $x$ ?

• 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.