jaleewoodyard1
16.09.2021 •
Mathematics
(a) Four numbers have a mean of 9 and
a median of 6. The four numbers are 2,
5, a, b. Find the value of a and b.
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Ответ:
a=7
b=22
Step-by-step explanation:
mean=9
so sum of numbers=9×4=36
also
2+5+a+b=36
a+b=36-7=29
number of terms=4
median =(2nd+3rd)/2
so
(5+a)/2=6
5+a=12
a=12-5=7
7+b=29
b=29-7=22
Ответ:
A.
Step-by-step explanation: