<prompt> Mutsara wokutanga: Nokuda kwechimiro chakatarwa chinogona kuyerwa 18, chimiro 19 chinhu chinoshanduka chisina kurongwa chine chimiro chepakati 20 uye chimiro chekusiyana 21. Mutsara wechipiri: Nokuda kwebasa risingachinji rinogona kuyerwa formula _ 18, formula _ 19 inochinja yepakati ine random formula _ 20 uye variance formula _ 21. Mubvunzo: Mutsara wokutanga nomutsara wechipiri unoreva chinhu chimwe chete here? Hungu kana kuti Aiwa?  <response>: Kwete 