Question

Jack works as a waiter and is keeping track of the tips he earns daily. about how much does jack have to earn in tips on sunday if he wants to average $19 a day? a graph titled tips by day has day on the x-axis, and tips (dollars) on the y-axis. monday, 12; tuesday, 14; wednesday, 18; thursday, 16; friday, 26; saturday, 22. a. $25 b. $16 c. $35 d. $15 please select the best answer from the choices provided a b c d

Answer 1

A mean is an arithmetic average of a set of observations. The amount that Jack has to earn in tips on Sunday if he wants to average $19 a day is $25.

What is Mean?

A mean is an arithmetic average of a set of observations. it is given by the formula,

$\rm Mean=\dfrac{\text{Sum of all obervation}}{\text{Number of observation}}$

As it is given that Jack makes $12 on Monday, $14 on Tuesday, $18 on Wednesday, $16 on Thursday, $26 on Friday and $22 on Saturday. And we need to know how much he should earn on Sunday, so the average is $19. Therefore, we can write,

$\rm Mean=\dfrac{\text{Sum of all obervation}}{\text{Number of observation}}$

$19 = \dfrac{12+14+18+16+26+22+x}{7}\\\\133 = 108 + x\\\\133-108=x\\\\x = 25$

Hence, the amount that Jack has to earn in tips on Sunday if he wants to average $19 a day is $25.

Learn more about Mean:

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