The mean of 7, 9, 11, 13, x ,21 is 13. Then the value of x is.

Foundation

Mathematics Foundation

Mean

Question

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

The mean of 7, 9,11, 13, x, 21 is 13
then 13 = $\frac{7 + 9 + 11 + 13 + x + 21}{6}$
⇒ 78 = 61 + x
⇒ x = 78 – 61 = 17

Please subscribe our Youtube channel to unlock this solution.