Winston has just received his monthly credit card statement. He placed 7
charges on his card in the last month with a mean of $35.82
per charge. He knows that 6
of the charges were as follows:
$35.55,$34.88,$34.70,$35.76,$40.24,$33.19
Determine the amount of the 7
th charge.
To find the amount of the 7th charge, we can calculate the total of the 6 known charges and subtract it from the total of all 7 charges.
Total of 6 known charges: $35.55 + $34.88 + $34.70 + $35.76 + $40.24 + $33.19 = $214.32
Mean of all 7 charges: $35.82
Total of all 7 charges: $35.82 * 7 = $250.74
Amount of the 7th charge: $250.74 - $214.32 = $36.42
Therefore, the amount of the 7th charge is $36.42.