GMAT Critical Reasoning (CR) | A birth is more like to be difficult when the mother is over

facts

- over 40- tough birth

tougher birth -> ambidextrous


since- other causes of ambiD are not related to mother age

assumption-
there are more number of women over 40 who get pregnant than are women less than 40
or more number of birth for over 40 than for less than 40

so we need to weaken this assumption


conclusion- more amb people to women who are over 40 than under 40

(let's say total 1000 ambidextrous born in a year- 700 ambidextrous born to over 40 age women, 300 born to
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