जीवों में विविधता - L3 | पादप जगत | कक्षा 9 NCERT विज्ञान | Chapter 7 | Pooja Mam

The proportion of the number of students in three classes is 1 : 2 : 3. If 20 students are included in each class, then the proportion becomes 3 : 5 : 7. What was initially the total number of students in the three classes? तीन कक्षाओं में छात्रों की संख्या का अनुपात 1 : 2 : 3 है | यदि प्रत्येक कक्षा में 20 छात्र शामिल कर लिए जाते हैं, तो यह अनुपात 3 : 5: 7 हो जाता है | इन तीन कक्षाओं में आरंभ में कितने छात्र थे?

The average weight of a certain number of students in a class is 68.5 kg. If 4 new students having weights 72.2 kg, 70.8kg, 70.3kg and 66.7 kg join the class, then the average weight of all the students increases by 300 g. The number of students in the class, initially is: किसी कक्षा में छात्रों की एक निश्चित संख्या का औसत वज़न 68.5 किलो ग्राम है | यदि 4 नए छात्र कक्षा में आ जाते हैं, जिनका वज़न क्रमशः 72.2 किलो ग्राम, 70.8 किलो ग्राम, 70.3 किलो ग्राम तथा 66.7 किलो ग्राम है, तो सभी छात्रों का औसत वज़न 300 ग्राम से बढ़ जाता है | आरंभ में कक्षामें छात्रों की संख्या कितनी थी ?

delta=beta F 2 T K S 7 5 # $ P L V 8 @ M 6 uarr Q G © 9 3 & T Y ₤ What will come in place of question mark (?) in the following? If' = rarr 2', 'K rarr #', P rarr M', then 'uarr rarr ?'.

delta=beta F 2 T K S 7 5 # $ P L V 8 @ M 6 uarr Q G © 9 3 & T Y ₤ Based on the positions in the above arrangement, is beta F delta : T & ₤, then K T 7 : ?

J Y 2 = S £ α E G M Δ 7 $ H P 9 K L β @ W Q 1 3 # C D © How many such symbols are there in the above arrangement each of which is either immediately followed by a letter or immediately preceded by a number, but not both?

J Y 2 = S £ α E G M Δ 7 $ H P 9 K L β @ W Q 1 3 # C D © How many such numbers are there in the above arrangement each of which is either immediately followed by a symbol or immediately preceded by a letter, but not both?

In a certain code language(एक निश्चित कोड में) '3a, 2b, 7c' means(का अर्थ) 'truth is eternal' '7c, 9a, 8b, 3a' means(का अर्थ) 'enmity is not eternal' '4d, 2b, 8b' means(का अर्थ) 'truth does not'. Which of the following means "enmity' in that language निम्नलिखित में से किसका अर्थ उस भाषा में "enmity" है?

B 5 R 1 @ E K 4 F 7 c L A M 2 P 3 % 9 H I W 8 * 6 U J $ V Q # Three of the following four are alike in a certain way based on their position in the above arrangement and so form a group. Which is the one that does not belong to that group? (a) R1E (b) F7L (c) M23 (d) UJ6

B 5 R 1 @ E K 4 F 7 c L A M 2 P 3 % 9 H I W 8 * 6 U J $ V Q # How many such symbols are there in the above arrangement each of which is immediately preceded by a number but not immediately followed by a consonat?