Answer:
10
Step-by-step explanation:
the mean of 10 observations is 7
sum of observations/10=7
sum=70
the mean of 15 observations is 12
sum/15=12
sum=180
new mean = 180+70/10+15
=250/25
=10
Copyright © 2024 EHUB.TIPS team's - All rights reserved.
Answers & Comments
sum of total occurence=19
mean=sum of all observation÷no of observation
19÷25=0.76 Ans
Answer:
10
Step-by-step explanation:
the mean of 10 observations is 7
sum of observations/10=7
sum=70
the mean of 15 observations is 12
sum/15=12
sum=180
new mean = 180+70/10+15
=250/25
=10