Step-by-step explanation:
1.
20+25+25+36+42+56+69+74+98+100 = 545
n = 10
Mean = 545/10
= 54.5
Median = 42+56/2 = 98/2 = 49
Mode = 25 since it occurred twice
2.
<u>If 98 is recorded as 78</u>
20+25+25+36+42+56+69+74+78+100
= 525
Mean = 525/10 = 52.5
Median = 42+56/2 = 98/2 = 49
Mode = 25
3.
<u>If 98 is removed</u>
20+25+25+36+42+56+69+74+ 100= 447
n = 9
Mean = 447/9 = 49.6
Median = 42
Mode = 25
