Probability Question?

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In the last 65 years, there have been 42 major volcanic eruptions around the world. Calculate the mean number of volcanic eruptions in two years.

2007-10-28 14:22:52 · 2 answers · asked by Will V 1 in Education & Reference ➔ Homework Help

65 years will be 32.5 2 year intervals 65 / 2= 32.5

The mean is:

42 / 32.5 = 1.29 eruptions every 2 years

2007-10-28 14:32:07 · answer #1 · answered by JuanB 7 · 0⤊ 0⤋

42/65 = ?/2

cross multiply

2007-10-28 21:30:40 · answer #2 · answered by cameragirl90210 2 · 0⤊ 0⤋