borsha255
13.04.2021 •
Mathematics
Don drives his car 25 km east and then 312 km south. How far is he from his starting point? Round to the nearest tenth.
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Ответ:
total bolts=21
total nuts= 12
no of way picking bolt and nut is= 21*12=252
no of way getting thick bolt and thick nuts = 9*7=63
no of way getting medium bolt and medium nut=8*3=24
no of way getting thin bolt and thin nut= 4*2=8
total ways=63+24+8=95
required probability= 95/252=0.3769