While other numbers in the option given are rational, only √48 is an irrational number
Rational number refers to all real numbers which can be expressed in the form x/y. Given that y ≠ 0.
Evaluating the values given :
- 26.6 is a rational number ; 266/10
- -51/2 is also a rational number
- -55.1 is also a rational number ; - 551 / 10
- √48 is an irrational number as it cannot be expressed in the form x/y.
Therefore, the only √48 does not belong to the group.
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