Question

4. Mean of three numbers is 50. If two of them are 30 and 50. what is the third number?

Answer 1

Answer:

Mean of 3 numbers = 50

Let the third number be x

Then,

3

x+30+50

=50

⇒

3

x+80

=50

⇒x+80=150

∴x=70

Step-by-step explanation:

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Answer 2

Answer:

70

Step-by-step explanation:

Let the third number be 'x'

A/Q

$\frac{30 + 50 + x}{3} = 50$

$= > \frac{80 + x}{3} = 50$

$= > 80 + x = 150$

$= > x = 150 - 80$

$so \: \: \: \: x = 70$

Hence third number = 70