Xisaabinta ixtimaalka aragtida ee jaantusyada Venn (hal dhacdo)

Salaan, waxaan ahay Mrs. Lashley, waxaanan aad ugu faraxsanahay inaan kula shaqeeyo casharkan maanta. Casharkayagu wuxuu ku saabsan yahay sida loo xisaabiyo ixtimaalka (theoretical probability) jaantuska Venn (Venn diagram) adoo diiradda saaraya hal dhacdo (event) oo keliya. Waa inaad horey uga warqabtaa fikradaha guud ee ixtimaalka iyo jaantuska Venn si aad uga faa'iidaysato casharkan.