Doubt in accords

Question

Bonjour Cécile,
I have observed that while writing passé composé,two types of sentences are possible-
1.Où êtes-vous allé en vacances?
2.Où êtes-vous allés en vacances?
Why has the extra "s" been added in second sentence although both are congucated with "vous" form?
Pls guide with this rule.
Thanks in advance
Also Madame Pls spare some time of yours to answer the below query of mine asked 3 days ago-
https://french.kwiziq.com/questions/view/doubt-in-comparative-form-of-bien-1
Merci beaucoup Madame.

Accepted Answer

Hi Varsha, Though the question is addressed Madame Cécile, I take the liberty to reply part of your question. "Vous" when used to refer to single individual (to show respect or stranger) No: 1.Où êtes-vous allé en vacances? . When "Vous" is used to refer to more than one person or group of persons, being plural No: 2. Où êtes-vous allés en vacances? is appropriate. "s" is added to "aller"(conjugated with 'être") in No:2 plural format. So both forms are correct depending on the context.

Answer

Hi Varsha,
Yellamaraju's answer is correct , your other query is answered separately...

Answer

Merci beaucoup madame.
Vous m'aidez beaucoup.