2
8, 9, 11 and 12
-4
It is 10.
The fourth number is 10. The sum of the four numbers is: 12 + 50 + 48 + fourth_number = fourth_number + 110 Mean = sum_of_numbers / how_many_numbers → sum_of_numbers = mean × how_many_numbers = 30 × 4 = 120 But from above: sum = fourth_number + 110 = 120 → fourth_number = 120 - 110 = 10
At least 12 numbers means 12 numbers or more
(12 + 24 + 48)/3 = 84/3 = 28
There are 12 such numbers.
you add all of the numbers in the group together and then divide the number you get by how many numbers are in the group EX: your group is 21, 32, 12, 15. you add 21+32+12+15= 80. then you divide 80 by 4 because you have four numbers in your group. so your mean is 20!
9 + 10 + 11 + 12 = 42
I assume you mean how many 4-digit numbers can be made from a set such as {A,A, B, C} where A, B and C are single digits. There are 12 such numbers.
6, 12, 18, 24 are four numbers with a GCF of 6
The numbers are 9, 10, 11 and 12.