The ratio of the number of women to the number of men to the number of children in a room is 5: 2: 7, respectively. what is the total number of people in the room? (1) the total number of women and children in the room is 12. (2) there are fewer than 4 men in the room.

The total number of people in the room is 14

Step-by-step explanation:

The ratio of the number of women to the number of men to the number of children in a room is 5:2:7

So,  there are

(1) The total number of women and children in the room is 12.

5 women and 7 children=12

(2) There are fewer than 4 men in the room.

There are 2 men ,  that´s fewer than 4

So, the total number of people is 5+2+7= 14

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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