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labdelwahab12
10/20 or 1/2 i think i hope this answer satisfies you
altavistard
All numbers 1-10 are equally likely to be chosen.  Of these 10 numbers, 5 are odd.  Thus, the chances that an odd number will be chosen by either boy is 0.5.  The chances that both boys will pick an odd number is 0.5*0.5 = 0.25.