CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

If 9th and 19th terms of an AP are 35 and 75, then its 20th term is

A
78
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
79
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
80
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
81
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 79
T9=35a+(91)d=35a+8d=35
T19=75a+(191)d=75a+18d=75
Solving these two we get
d=4,a=3
Therefore,
T20=a+(201)d=3+19×4=79

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Arithmetic Progression
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon