( 1 ) THIRTEEN petitioners have joined together and filed this writ petition challenging the action taken by the respondent and have prayed for a mandamus directing the respondent to announce the results of the petitioners. After the petition was presented the respondent was directed to produce in this Court the answer books of the petitioners for our perusal. Accordingly the answer books were produced in Court when the hearing commenced today. The learned Standing counsel raised a preliminary objection that the cases of the petitioners were different from each other, the adverse action taken against each of them furnished a distinct cause of action and hence a single petition on behalf of them was not competent. It is not disputed that they were all aggrieved by a single order which was in the shape of a composite order with a schedule, mentioning each one of them by name and indicating the action taken against them, namely, withholding of the result for the High School examination, held in 1980. Where the action taken against several petitioners is identical and is embodied in a single order, all of them can legitimately combine together and file a single writ pe