Answer / guest

35%

Answer / mukul

number of people who only know shorthand =3/5-1/5=2/5
number of people who only know typing =1/4-1/5=1/20
total no of people who kow one one or other or both =2/5+1/20+1/5=13/20
people who do not know both= 20/20-13/20=7/20
=7/20*100
=35%

Answer / manoj

4/5

Answer / guest

4/5

Answer / rahul kumar

It should be 1-1/5=4/5.

Answer / essy

3/5-1/5=2/5
1/4-1/5=1/20
2/5+1/20+1/5=13/20
20/20-13/20=7/20
7/20*100
35

Answer / sneha

1 - ( 3/5 + 1/4 - 1/5) = 7/20

Answer / chache

4/5

Answer / bidisha pandit

People who do not know both=1- People who know atleast 1.
1-(3/5+1/4-1/5)
=1-(13/20)
=7/20

Answer / rusty

9/20

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