Wyatt and his little sister are saving up money to buy a joint birthday present for their mother. Wyatt already has $20 saved and plans to save $7 per week from his allowance. His sister has $14 saved so far and will save $9 per week from hers. The two siblings will soon have saved the same amount towards their mother's gift. How much will each one have saved? How long will that take?

The two siblings will have saved the same amount towards their mother's gift after 3 weeks.

Amount saved by Wyatt =

Amount saved by Wyatt's sister =

Step-by-step explanation:

Let (in weeks) denotes the time period by which  the two siblings will have saved the same amount towards their mother's gift.

Wyatt already has $20 saved and plans to save $7 per week from his allowance.

Amount saved by Wyatt =

Wyatt's sister has $14 saved so far and will save $9 per week from hers.

Amount saved by Wyatt's sister =

To find the time period by which the two siblings will have saved the same amount towards their mother's gift,

solve the following equation.

So, the two siblings will have saved the same amount towards their mother's gift after 3 weeks.

Amount saved by Wyatt =

Amount saved by Wyatt's sister =

13.33%

say 50 oranges, then 100 apples

80 are red, 20 are yellow

total fruit = 150

20chances out of 150 for yellow

20/150 = 13.33%

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.