If \( 3^2 \) is calculated, what is the result?

- A teacher has three grade 9 classes with 21,35 and 28 students, respectively The teacher wants to order some mathematical equipment that can be used by groups in each class. What is the largest number of students in a group in each class sa. that each group has the same number of students?

Q.44. 48 संख्याओं का औसत 78 है। यदि हम प्रत्येक संख्या में से एक संख्या ' \( X \) ' घटा दें, तो औसत 57 हो जाता है। \( X \) का मान कितना है? \( \begin{array}{llll}\text { (a) } 24 & \text { (b) } 22 & \text { (c) } 21 & \text { (d) } 26\end{array} \)

Q.49. \( 25 \% \) और \( 10 \% \) की दो क्रमिक छूटों के समतुल्य एकल छूट ज्ञात कीजिए। \( \begin{array}{llll}\text { (a) } 31.9 \% & \text { (b) } 35.5 \% & \text { (c) } 32.5 \% & \text { (d) } 38.4 \%\end{array} \)

10. \( (899)^{2} \) નું મૂલ્ય શોદો.

પદાવલિ : \( \sqrt{2401} \times 4 \) નું સાદું ર૫ આ