Question

The average of five numbers is 54. If three of the numbers are 26, 28, and 30, what is
the average of the other two?​

Answer 1

answer:

answer is 68

Step-by-step explanation:

• so we know average or the mean is sum of all terms divided by number of terms
• sooo we get the equation
• 54 = (26 + 28 + 30 + a + b)÷5
• here a and b are the 2 unknown numbers
• so we get 220 = 84 +a +b on simplifying
• from here we get a+b = 136
• now the mean of the other 2 numbers is the mean of a and b which is
• mean = (a+b)÷2
• but a+b is 136 so your answer is 136÷2 that is 68

Pls mark as brainliest if this was helpful

Answer 2

Answer:

Sum of 6 numbers =60×30=180

Sum of first 4 numbers =4×25=100

Sum of last 3 numbers =3×35=105

∴ Fourth number =(100+105)−180

=205−180

=25