Conditional Probability for 2 boys when one is Boy

[omprakashtiwari]

Your valuable lecture is awaited on power transformer Sir

[tesfayeawgchew]

your evaluation is clear and regorious! Thank you.
But, how could the answer of choice (a) is less than (b) even if the first occurance is mostly happens😂😂
event (b) is part of event (a) so p(a) >= p(b).