Answer:
98
Step-by-step explanation:
let 'x' = # students speaking more than one language
<u> 7 </u> = <u> x </u>
10 140
10x = 980
x = 98
7.
21 = 3 * 7
28 = 2 * 2 * 7
42 = 2 * 3 * 7
Collecting common factors:
t is common to all 3 sets of factors so
HCF = 7.
8
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6
