All categories

3 years ago

The mean length of 6 childrens' big finger is 6.7cm.

Mathematics

1 answer:

yaroslaw [1]3 years ago

7 0

Answer:

New mean length of these 17 people=11.62

Step-by-step explanation:

Step 1: Determine the total length of children's fingers

L=l×n

where;

L=total length (cm)

l=mean length (cm)

n=number of children

replacing;

L=6.7×6=40.2 cm

The total children's fingers length=40.2 cm

Step 2: Determine the total length of adults fingers

total length of adults fingers=mean length of adults fingers×number of adults

where;

mean length of adults=14.3

number of adults=11

replacing;

total length of adults fingers=(14.3×11)=157.3 cm

Step 3: Determine the new mean length

new mean length=total length of adults and children fingers/number of adults and children

where;

total length of adults and children fingers=157.3+40.2=197.5 cm

number of adults and children=11+6=17

replacing;

new mean length=197.5/17=11.62

You might be interested in

Graphic image of the kite jklm after a reflection across the line Y= 1

olchik [2.2K]

Answer: see image

Step-by-step explanation:

Draw the line y = 1. Count how many units away the point is from that line. Move that point the same number of units in the opposite direction to create the reflection.

J is 2 units above y = 1. The new point is 2 units below y = 1. → (3, -1)

K is 3 units above y = 1. The new point is 3 units below y = 1. → (6, -2)

L is 5 units above y = 1. The new point is 5 units below y = 1. → (3, -4)

M is 3 units above y = 1. The new point is 3 units below y = 1. → (0, -2)

5 0

3 years ago

Read 2 more answers

A school has 600 pupils. 1/5 are in the upper school, 1⁄4 in the middle school and

crimeas [40]

Step-by-step explanation:

the number of pupils are in the lower school

= (1- 1/5 - ¼) × 600

= (20/20 - 4/20 - 5/20)×600

= (11/20) ×600

= 330 pupils

4 0

2 years ago

two cars travel in opposite directions, starting from the same place at the same time. One travels at an average rate of 48 mile

asambeis [7]

So in 1 hour they will be 48+55=103 miles apart
how many hours will it be in 618
103 times x hours=618
divide both sides by 103
x=618/103
x=6

the answer is 6 hours

6 0

3 years ago

Someone help pleaseee

gregori [183]

Answer:

the answer is 1/2 which loos like "D"

Step-by-step explanation:

the top ends up being x ^-8 and the denominator is x^-7

which is x^&/x^8 = 1/x = 1/2

4 0

2 years ago

If a kid is 145 cm and he owns an eraser that is 6.8 cm long, 1.5 cm wide, and 1.5 cm tall. If a scientist shoots him with an en

never [62]

To answer this you’d have to use an 2 step equation 145x= 1000
When u get the answer for x multiply the answer by the erasers original area to find the area of the eraser it would be lengthtimes width times height

4 0

3 years ago