Answer:
The mean of the combined group is 76.67 ≈ 77
Step-by-step explanation:
- The sum of the grades in Tom's group is 20×70 = 1400
- The sum of grades in Alice's group is 10×90=900
- The sum of gradees in the combined group is =1400+900=2300
- Then the mean grade of the combined group is

where
- 2300 is the sum of the all grades in the combined group
- 30 is the total number of people in the group
Answer:
1/6
Step-by-step explanation:
there are 6 dresses altogether and 1 blue dress.
The algebraic expression 1/8y verbal expression is: one is
divided by the product of 8 and a number.
To decipher the mathematical information
in a problem, a verbal expression (or verbal model) uses
words. From a verbal model,
an equation can often be
written.