Question

Let R be a relation on a collection of sets defined as follows,R={(A,B)|A⊆B}
Then pick out the correct statement(s).
1. R is reflexive and transitive
2. R is symmetric
3. R is antisymmetric
4. R is reflixive but not transitive
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Answer 1

Answer:

b) The ages of three sisters add up to 42 years. If the second sister is five years older than the first and the third is as old as the other two sisters put together, calculate the age of the older sister minus 20

Step-by-step explanation: