1/5 : 1/7 : : __ : 1/9
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1/5 : 1/7 : : __ : 1/9
answer : 1/3
Answered by
1
SOLUTION:--
IN PROPORTION WE KNOW THAT PRODUCT OF EXTREME = PRODUCT OF MEAN
LET THE UNKNOWN NUMBER = X
=》 1 × 1 = 1 × X
5 9 7
=》 1 = X
45 7
=》 X = 7
45
ANSWER :-- 7
45
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