An adult blinks about 450 times in 30 minutes. A 12 year old blinks about 150 times in 15 minutes. How many more times does an adult blink in minutes than a 12-year-old?

1 Answer
Junaid Mirza
Mar 11, 2018

Adult blinks #5# times more than 12-year-old.

Explanation:

Frequency (#f#) is the number of occurrences of a repeating event per unit of time.

#f_"adult" = 450/"30 min" = "15 min"^-1#

#f_"12-year-old" = 150/"15 min" = "10 min"^-1#

Adult blinks #15# times in a minute and #12#-year-old blinks #10# times in a minute.

∴ Adult blinks #5# times more than #12#-year-old.

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