Question

31. क्रिकेट के एक खिलाड़ी ने 11 पारियों में कुछ रन बनायें। 12वीं पाली में उसने
90 रन बनाये तथा इससे उसकी औसत रन संख्या में 5 की वृद्धि हो गई। 12वीं
पाली के बाद इस खिलाड़ी की औसत रन संख्या ज्ञात करें।​

Answer 1

Answer:

145

Step-by-step explanation:

let the runs scored by the player in 11 innings be a player scores 90 runs in 12th inning

therefore, average runs = (runs scored in 11 innings + 90)/12 = x.

i.e. (a+90)/12 = x ... scores in 11 innings = a. (i)

average runs in 11 innings = a/11

given, that average runs of the player decreased by 5 runs after 12th inning

i.e.

average runs in 11 innings = a/11 = x + 5.

therefore, x = (a /11) - 5

from (i) we have

(a + 90)/12 = (a/11) - 5

after solving

a = 1650

thus,

(a + 90)/12 = x

x = (1650 +90)/12

= (1740)/12

x = 145

12वीं पारि के बाद इस खिलाड़ी की औसत रन संख्या hai 145.