Question

louden county wildlife conservancy counts butterflies each year. data over the last three years regarding four types of butterflies are shown below. what is the average number of variegated fritillaries for all three samples?

louden county butterfly count

	2009	2010	2011
variegated fritillary	7	variegated fritillary	95	variegated fritillary	63
zebra swallowtail	33	zebra swallowtail	21	zebra swallowtail	10
eastern - tailed blue	242	eastern - tailed blue	168	eastern - tailed blue	170

55
83
106
165

Explanation:

Step1: Identify the counts

The number of Variegated Fritillaries in 2009 is 7, in 2010 is 95 and in 2011 is 63.

Step2: Calculate the sum

$7 + 95+63=165$

Step3: Calculate the average

The average is $\frac{165}{3}=55$

Answer:

55