alleryତିନୋଟି ସଂଖ୍ୟା 10, x, 30 ସମାନ୍ତର ପ୍ରଗତିରେ ଅଛି। x କ’ଣ?
A15
B25
C22
D20
Answer & Solution
Correct answer: D. 20
ସମାନ୍ତର ପ୍ରଗତିରେ ଥିବା ତିନୋଟି ସଂଖ୍ୟାର ମଧ୍ୟମ ପଦଟି ବାହ୍ୟ ଦୁଇଟିର ହାରାହାରି ଅଟେ, (10 + 30) / 2 = 20।
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