Question

the sum of three rational number is -1/5 if two of the numbers are 3/10 and -2/5 find the third number

a) -7/10
b) -11/10
c) 2/5
d) -1/10​

Answer 1

Answer:

a) -7/10

Step-by-step explanation:

the sum of three rational number is -1/5

Answer 2

Answer:

The correct option is C

−

1

10

Let the unknown number be

x

.

−

1

5

=

3

10

+

−

2

5

+

x

x

=

−

1

5

−

3

10

+

2

5

Taking LCM, we get,

x

=

−

2

10

−

3

10

+

4

10

x

=

−

1

10